Motoyasu Kitamura/Chronology

Volume 1
Motoyasu is the Spear Hero, one of the Four Legendary Heroes summoned from another world. He was summoned along with the three other Legendary Heroes in Melromarc. Like two of the other heroes, Motoyasu pretends that he doesn't care about being summoned to another world. Motoyasu doesn't particularly think much of the other heroes and rather invest his time in chasing and flirting with women.

Because of his gullibility, he was easily deceived by Myne and tricked into helping her accuse Naofumi of a false crime he never committed and causing Naofumi to be outcast as a criminal.

He was once again deceived by Myne and confronted Naofumi after hearing that Raphtalia was his slave. He forced Naofumi in a one-sided duel and only won because of Myne's interference which he was unaware of. After Raphtalia's curse mark was removed, he was shocked by the fact that Raphtalia had slapped him and yelled at him angrily before going back to Naofumi to comfort him. Ren and Itsuki later pointed out to Motoyasu that someone had interfered with the duel and announced Motoyasu as the loser. Motoyasu couldn't believe his eyes and claimed Raphtalia was brainwashed, which the other heroes were amazed that he could say that after seeing Raphtalia lovingly embrace Naofumi.

Volume 2
Motoyasu was given the largest of the rewards and praise from the king. When Naofumi was denied his promised allowance, Motoyasu says that Naofumi wasn't anywhere nearby at the time of fighting the wave. Itsuki and Ren joined in supporting Naofumi about the unfair duel which prompted Motoyasu to shout that he didn't lose.

Later, Motoyasu was named Governor of the wave-affected Riyute Village. Malty levied a tax of 50 silver coins for entry or exit of the village on his behalf. Motoyasu was baffled by the protest of the villagers, for he had really no grasp of the value of the money demanded. After realizing the grim situation, Motoyasu asked Malty to reconsider but she wasn't lending her ear. Due to circumstances, the Governorship of the village was depended on an unreasonable duel between Naofumi and Motoyasu. Motoyasu was confident of his victory and started laughing at Filo, who retaliated by kicking him in the crotch, much to Naofumi's delight and enthusiasm for the race. Not noticing any foul play, Motoyasu raced but was defeated. As promised, the ownership remained with the previous Governor.

He once delivered a sealed "miracle seed" to a village in the south to save them from famine. Though his game knowledge helped him at that instant, it didn't go exactly as he promised the villagers it would. As it turns out, the seed actually was the seed of a giant monstrous plant which caused a lot of damage to the village after he left, as Naofumi pointed out the seed must have been sealed away for a reason and found the inscription matched his assumption. Motoyasu didn't know about his failure and continued to believe he did a great deed for the village.

Volume 3
Motoyasu was completely blind to all of Malty's unreasonable spending. After seeing Filo in her human form, he charged at Naofumi for her freedom, and also to demand that Naofumi's monster bird be killed, as it always kicked him in the crotch. After realizing that Filo and the bird are one and the same, he was petrified but was kicked away by Filo.

When the Cult of Three Heroes claimed that Naofumi had a brainwashing shield and that he kidnapped the second princess, Motoyasu completely believed the claim. He didn't notice Malty's attempt to kill Melty, while the other heroes did and began to suspect that things were not quite how they appeared to be. Motoyasu puts all his effort into hunting down Naofumi, in a way favoring Malty and the Church of the Three Heroes. Naofumi feels that Motoyasu's efforts to free Filo from his control might be more about wanting to claim her for himself because the former said that he "digs moe angels" and his suspicions are all but confirmed when, during the time when the three heroes are trying to rescue Melty from Naofumi's "kidnapping," Motoyasu attaches a chain to Filo's leg that takes away her powers so Motoyasu can claim her for himself.

Volume 4
Convinced of Naofumi's guilt, Motoyasu and his party keep chasing down the Shield Hero's group across the mountains all the way to Van Reichnott's territory. Nevertheless, he ended up losing their tracks when Raphtalia's illusion magic and Filo's false trail lead his group in the wrong direction. Unknown to him, tired of chasing her sister and Naofumi, Malty started a fire in the woods to smoke out her prey. Later, he was told or assumed that Naofumi was the one behind the forest fire.

Days later, he encounters with the Shield Hero again, after Naofumi met Fitoria, and unlike the last time, Naofumi tried to make peace with Motoyasu, but the Spear Hero showed more determination than ever to kill him. He has been fed false information by the church's Shadows and believed the story of Naofumi's killing of the other two heroes so he decided to avenge them. After the fierce battle, he tried to give his all in the hope of freeing Melty, Raphtalia, and Filo from Naofumi's supposed brainwashing power.

However, while fighting one another the two heroes are attacked by the Church of the Three Heroes using the ceremonial spell Judgement which Naofumi only narrowly blocks using the Wrath Shield. The High Priest makes his presence and his role as head of the conspiracy known and admits having used the same spell from just now to kill Ren and Itsuki and their parties. Motoyasu tries to get Naofumi to help but Naofumi's grudge from Motoyasu's mistreatment is still holding strong.

As the two argue the Pope launches another attack using the Legendary Weapons Replica forcing the two to team up to fight the pope. As their first volley, Naofumi has Filo toss him and Motoyasu into the air and has Motoyasu attack him triggering self burning curse before firing a Meteor Thrust at the pope. Sadly Motoyasu's attack proves too weak and Naofumi's curse is nullified by the Pope's holy power. They both retreat and get healed by Motoyasu's companions while they work on a plan B.

Motoyasu has his companions cast support magic on him and combines their power together with Meteor Spear and producing a combo skill called Fire Storm Meteor Spear before firing it at the Pope, and subsequently fizzling out before it could reach him or his followers. Instead, the Pope's followers cast another Ceremonial spell, Castle Wall, blocking the group of their opportunity to eliminate the Pope's followers.

As the Pope is about to finish the group off Itsuki and Ren, still very much alive, fire off Meteor Bow and Hundred Swords to stop the Pope's attack. Buying time Itsuki and Ren are able to shatter the Pope's barrier with some of their stronger skills causing the Priest to momentarily backpedal. Naofumi organizes the heroes into an attack unit and their followers between support and defense before flinging himself into the hoard of brainwashed followers and having the Heroes attack him to activate self burning curse in the middle of the enemy formation.

Between the curse from Naofumi's shield and the rain of attacks from the Heroes, the disciples' numbers are reduced but the priest isn't affected who responds with more attacks. As the support troops from the Kingdom's army arrives the High Priest devolves into further megalomania and spits out a Phoenix Blade skill to attack them and hides himself using the illusion arrow ability. Naofumi defeats the High Priest using a new skill from the Wrath Shield, Blutopher at the cost of his health.

Once Naofumi recovers he, Motoyasu and the other heroes are led into the throne room of Melromarc where they witness the Queen Mirellia Q Melromarc subjugate the King. Once she's re-established her authority Mirellia moves onto business: explaining that in order to Pacify their enemy Siltvelt which views Naofumi as a god she would like Naofumi to marry one of her daughters and give her a child to pacify them. Since Naofumi rightfully hates Malty she would like him to take Melty instead.

Motoyasu attempts to defend Malty from her accusations however the Queen decides to have Malty tell Motoyasu the truth herself, branding her with a high-level slave seal. Naturally, Motoyasu tries to protect Malty but Naofumi stops him with Shield Prison and the branding proceeds as intended. After the Queen establishes co-ownership with Motoyasu the Spear wielder witnesses as the slave settings that he checked himself shocks Malty for every lie that she tells, which is to say almost every time she opens her mouth, as a confession is wrung out of her for all the horrible things she's done.

Similarly, an explanation is demanded from the King, who can do nothing more than blame his collective woes on Naofumi. Despite Motoyasu's protest for Mirellia 'mistreating' her family Itsuki and Ren voice their suspicions that they've managed to accumulate and Motoyasu is told that if he is going to object to Malty's mistreatment anymore then he is going to have to go out and find evidence of her innocence and is escorted from the throne room so that he doesn't cause any more disturbances.

Volume 5
When a meeting was held in order to have the Heroes coordinate in anticipation of the upcoming waves Motoyasu is delayed from attending the meeting by the actions of Bitch, formerly known as Malty, who tried to poison Naofumi. Once Malty's confession has been wrung out of her. Though dissatisfied and quick to blame Naofumi, Motoyasu still participates in the meeting to discuss and strategize the best way to fight the waves.

Mirellia begins by stating her opinion, and the opinion of both the citizens and the officials of the numerous neighboring countries, that Motoyasu, Ren, and Itsuki are too weak to survive the upcoming waves. Unless something is done Naofumi will be the only one who will survive the next wave. Naturally, Motoyasu and the others want to hear from Naofumi first: after all in spite of being the lowest level and the tank he has the most damage dealing ability and the strongest party members.

Before he tells them anything though Naofumi wants to hear from the three of them. When they first came to this world they had advance knowledge on the waves, their weapons, and the world while Naofumi had nothing: then they sat him down and told him that he was a weakling to his face. All that Naofumi is asking for is that they be put on even ground and then he will share with them the fruits of his research.

To Naofumi's rapidly mounting concern it becomes apparent that the others still have the mindset of the world just being a game: if they do die they will just wake up at the nearest hospital no worst for wear, the fights against the High Priest and against Glass seems to serve as proof of their delusional beliefs. Furthermore, Motoyasu and the others are under the impression that the third wave was simply an even battle, one that they were supposed to lose in order to advance the plot of the 'game' that they find themselves in.

That said they did legitimately try to kill Naofumi, under the impression that only heroes could actually kill other heroes, that said they believed that rather than permanently dying Naofumi would just get sent back to his world, a statement that makes Naofumi want to send the three of them back to their worlds too. Moving on, Naofumi has them tell him everything they know from the get-go, information found in their help screens included.

Before moving onto actually useful information, Naofumi employs psychological warfare to make sure they don't lie to him. Aside from information that Naofumi already knew, Ren and the others reveal that the legendary weapons have the ability to copy other weapons that they pick up that belongs to the same class as their legendary weapons, a fact they discovered when they, like Naofumi, tried to buy better weapons in Melromarc's weapon shops, the difference being that they had picked up weapons that were the same as their Legendary weapons.

They also reveal that the legendary weapons have the ability to transform the monsters they kill into drops: weapons, armors, and tools for them and their companions to use. Also, if the necessary ingredients are fed to their weapons they can be set to automatically produce potions and other items for them. They also offer to make up a chart where Naofumi can get good exp and materials for his weapon. However, they disagree on the method for strengthening each individual weapon that their Legendary weapons can transform into.

Itsuki maintains that a weapon's power is tied to its rarity, it's power can be increased by feeding it specific ores. Ren maintains that proficiency is what's important in a weapon, the longer you use it the stronger it gets until it's reached it's maxed level, and if you have no intention to use it again then you can safely transfer that mastery to a more useful weapon to increase its proficiency. Motoyasu states that you can draw magical power out of objects and use it to give unique effects to weapons through refinement.

As their information doesn't line up the trio accuses one another of lying, even worst they then direct the frustration that they've built up by accusing one another of lying at Naofumi accusing him of gaining a god's favor to increase his and his companions' power. Naofumi maintains that it's not someone else's power: he unlocked Slave, Beast, and Filolial user shields that give a bonus stat growth with every level up for his companions.

He also explains the effect that Filo's cowlick feather that they got from Fitoria during the class up. When Naofumi mentioned Fitoria's ability to transport to the others mentioned that they unlocked a transport weapon from feeding sand from the Red Dragon Hourglass to their weapons. Back to the topic of Fitoria, Naofumi also warns them that Fitoria would hunt down and kill them if they don't start cooperating with one another to fight the waves.

Once again dismissing Naofumi's warning, the others accuse him of getting help from a god again to unlock the Wrath Shield. Naofumi once again states that he has not met this world's god, and even if he did he would not have this amicable relationship the others have imagined. To clarify, Naofumi believes that he unlocked the Shield of Wrath from his deep, festering hatred of this world and the other heroes, furthermore his help menu has informed him that the Wrath Shield is a cursed weapon and that he should not use it in spite of the power it has.

Sadly a quick glance through his own help menu reveals nothing to Ren which in turn causes the group to revert back to accusing one another of lying and Naofumi of cheating with vulgar insults being thrown in. The meeting is called short as a group of soldiers barge in informing them that the Heroes companions have gotten into an argument with one another.

When they get downstairs Bitch, Raphtalia, and Itsuki's companion Mald have engaged in a three-way insult match that is ultimately ended by the Queen who subdues Bitch with her slave seal and puts the meeting on hold for a while, with another reminded being delivered to Motoyasu about what Bitch's personality is really like as Motoyasu carries Bitch away to rest.

Motoyasu and the other heroes receive a message from the Queen detailing the fruits of Naofumi's experiments: All the heroes reinforcement methods work, using them all in combination will dramatically increase their fighting power, they just have to believe in one another. Instead, Motoyasu loads his party aboard the ship heading to the Cal Mira Archipelago for the bonus leveling event going on there with Itsuki and Ren's parties, taking all of the prepared rooms, the luxury room prepared for Naofumi and the captain's cabin.

The hero's greed backfires on them however when the extremely rocky waters on the ride over to Cal Mira tosses them around their rooms leaving them seasick, injured, and exhausted. When they do arrive on Cal Mira, Motoyasu and the other heroes are roped into a tour of the island where they are introduced to a statue of the animals that helped past heroes to pioneer the island with a plaque left behind by past heroes to help them.

However, Motoyasu dismisses the plaque because he can't read it, figuring that if heroes of the past did leave the Plaque behind they would have done so in a language that they would actually understand. Cue Naofumi, the only one of the four legendary Heroes who read the plaque and learns a powerful Buff Spell Aura which he then casts on Filo multiplying all of her stats. Immediately, Motoyasu and the other heroes crowd around the plaque as they demand to know what Naofumi fed to his shield to unlock the ability to read magical letters.

Naofumi states that it is not a shield ability, rather it is something that he has learned to do on his own. With this in mind, the other heroes want Naofumi to teach them the magic to wit Naofumi refuses to do to their entitled attitudes and suggests that they learn magic letters themselves, which convinces the others to unlock their own magic letters weapons and learn even better magic then what Naofumi has learned.

Moving on, the Earl of Habenburg explains that the increase in experience points from the activation event has shortened the life cycle of the monsters of the island chain, which in turn has dramatically increased their population. Towards this end the Earl has one request for the Heroes: kill every monster in sight. That said even with this in mind other adventurer's looking to level up are also going to be rampaging against the hoards of monsters and thus if they see any adventurer's fighting against the monsters they ask them not to interfere.

Motoyasu spends the next several days rampaging through the hoard of monsters on the island chain before breaking at a Tavern with Naofumi where Motoyasu makes with his usual routine of flirting with every woman in sight. There Naofumi quickly comes to enjoy the Rukulu fruits that were in a bowl at the bar, in spite of the warnings that the Bar Keeper and the other patrons keep giving continue to eat them.

Motoyasu wonders what the big deal is and eats one of the fruits, and nearly dies from what amounts to a super high concentration of alcohol and spends the night being tended to by his party members after being made to cough the fruit out. Eventually, Motoyasu recovers and resumes leveling when Naofumi and his party inform him and the other heroes of the underwater temple Filo found and the Dragon's Hourglass inside of it, counting down to another wave in less than two days.

Motoyasu and Itsuki are pleased with the idea of an incoming wave, wanting to put theirs and their parties' newly acquired levels to good use. Ren, however, shows a distinct lack of interest in participating in the wave, though the other heroes soon realize it's because he's afraid of water and Motoyasu and Itsuki test their theory by tossing him into the ocean, where Ren nearly drowns in waist-deep water. The Heroes are led to the underwater temple where they register at the underwater hourglass.

With little time before the wave, Naofumi sits the others down and talks to them about what they are planning to do during the wave. Specifically, Naofumi wants to recruit Melromarc's army into their parties, aside from the troops they will also get Melromarc's navy on their side as well, providing boats and platforms they can fight on he also wants to recruit a large number of adventurers as well. The logic is that most of the people there are using the activation event to farm for exp between that, the powerful monsters guaranteed to come with a wave, and the exp bonus from the Heroes weapons they should get a lot of volunteers.

Thus while Naofumi goes back to the castle to recruit the Queen and the soldiers, the other three heroes run around the island collecting as many adventurers as possible. When the Wave does come Motoyasu is not very useful, he is ordered to chase down the boss, the Inter-Dimensional Whale, which is attacking the army from the water, but despite his best efforts, his attack stat is too low to do serious damage to the whale.

He is stunned to witness L'Arc Berg and Therese Alexanderite take out the boss almost single-handily, shortly before the otherworldly hero knocks all of them out.

Volume 6
By the time Motoyasu had regained consciousness, the wave was already over. To his disappointment, he learned that Naofumi had sent the three other worlders that had beaten him and the other two heroes to a pulp packing which only makes his frustration against Naofumi grow even more. Mirella begins the discussion, though the rest of the Heroes claim that there is very little to discuss as Naofumi, who by this point in time even they cannot argue isn't the strongest among them, is the only one who has not been forthcoming.

As Naofumi once again reiterates, all they have to do is believe the methods will work and try using he slave magic he told them about. More to the point, he has no reason to stifle the others strength by holding back information. He has few methods of attack and the ones he does have access to, the Shield of Wrath, are exceedingly difficult.

Ren has already realized that the Iron Maiden has an excessively long activation time, and Blood Sacrifice would have killed Naofumi the last time he used it were it not for the Queen's medical assistance. Aside from them, the only other attacks Naofumi has is counter-attacks, which demands that he first receives an attack from the enemy, he cannot and never will be able to attack his own.

Accused of lying by Motoyasu again, Naofumi walks up to him and punches him in his face, leaving no damage in his wake, before sitting down again, firmly demonstrating that he has no attack ability and thus gains nothing from being stronger than the other three. Itsuki, however, claims that Naofumi is just a glory hog trying to claim the title of the one and only hero, a claim that seems to be backed up by Naofumi's claims that the otherworld invaders only regard him as a hero.

Tired of being accused of being a liar, Naofumi simply decides to remain silent. He has shared all the information he's had to share at this time and the others have chosen to ignore him. The Queen uses magic to forcibly bring the meeting to order with a giant ball of ice and puts aside the issue of the reinforcement methods. As the heroes seem to have had some advanced knowledge of the waves, she wonders if they know about the other world invaders.

Ren and the others do not recall ever meeting other world invaders in their games, nor do they know anything about the Waves beyond the fact that they're natural disasters that dump hoards of monsters on the world. Instead, they once again push the conversation towards Naofumi as he seems to have already met the two of them before the wave. Thus Naofumi recounts the tale of how he met the two back when the three heroes stole his room on the boat ride over to Cal Mira.

He also leveled with the two of them while on the islands, where he observed L'Arc uses his scythe to absorb monster bits in the same vein as the legendary weapons. Though Naofumi didn't think about it at the time they acted like it wasn't a big deal, likewise even when Naofumi absorbed the monster materials into his weapon they didn't show much of a reaction, in spite of the fact that they were looking for someone with a Legendary Shield, which leads to the disturbing and terrifying possibility that the people of the other world have mass-produced legendary weapons.

The Queen, however, reveals the existence of the Seven Star Weapons, weaker subordinate type weapons to the Four Legendary weapons: the Seven Star Projectile, Hammer, Gauntlets, Claw, Cane and Whip. Unlike the legendary Weapons which are used by individuals summoned from other worlds, the Seven Star heroes can be both summoned and can be promoted from existing citizens of the world.

But more to the point none of the listed weapons is a scythe, so L'Arc isn't a Seven Star Hero, instead, Naofumi thinks he and Glass are heroes from the world on the other side of the Wave's rifts, explaining their power. The revelation of the weapons leads Ren, Motoyasu, and Itsuki to wonder why they even fight in the waves if all of these other heroes are running around.

The queen subsequently states that Melromarc effectively gave up the right to any of the Seven Stars when they made a play to hoard all of the legendary heroes for themselves. With the clear difference in power between the Heroes of this world and the next one over, the Queen has come to only one logical conclusion: the Heroes need to undergo combat training, immediately. Motoyasu and the others are not happy about the idea preferring to simply have fun killing monsters and get praised for it.

Either way, until either the storms caused by the waves calm down or until the activation event is over, the Heroes are given permission to do as they please. Motoyasu was walking on the beach when he stumbled across Itsuki's former party member Rishia Ivyred whom he learns has turned suicidal following being ejected from Itsuki's party.

While feeling sympathy for the girl Motoyasu's first response was to push the problem off on Naofumi as quickly as possible, not wanting to repeat the events immediately prior to being summoned in which he was stabbed to death by his tsundere girlfriends. That said Naofumi does go to him for an explanation, interrupting his 'private time' with his girlfriends in the process, wherein he gives Naofumi what little information about the topic he does have.

When Motoyasu does get back to the castle, the combat instructors the Queen hired, Eclair Seaetto and Elrasla Grilaroc, have already arrived at the castle. After receiving a short lecture from the old woman, Motoyasu and the other heroes dismiss the idea of learning the Hengen Musou style all together based on the knowledge from their games which dictated that it was an ability that applied to unarmed combat, though in the process they admitted that the principles applied to the use of other weapons too.

To their credit, Motoyasu and the others do give the style a shot, being taken out to the mountains to train. But, they quickly grow frustrated with the lack of progress they make and instead resort to dragon hunting to make themselves feel better. In spite of Naofumi's repeated efforts to improve upon the training methods, the other Heroes and their companions give up on it completely and make an effort to try and leave the mountains to go back to their normal routine.

The Queen, however, has made an effort to stymie their plans: she's already sent a notice to the adventurer's guild not to give quests to the heroes and has reinforced the border with extra guards to keep them inside of the country. As it so happens she has a request for them if they want a break from the training, a hoard of unknown monsters are attacking villages to the Southwest of Melromarc and the Queen needs someone to deal with them.

After obtaining a basic amount of information about the monsters, Ren, Motoyasu, and Itsuki deduce the one responsible for these events to be the Spirit Tortoise and forces their way through the border in rush to confront it using dragons, horses, and Filolial's so that they can claim the glory of killing it and the lucrative materials for their weapons. Instead, Motoyasu's and Itsuki's parties abandon them while Ren leads a suicide attack against the turtle culminating in the death of his party.

All three heroes wind up the prisoners of Kyo Ethnina.

Volume 7
Ren, Motoyasu, and Itsuki are revealed to have been made into Kyo's experimental subjects. He has connected them to the Spirit Tortoise which is siphoning off their power to fuel itself and is studying them with the goal of duplicating approximations of their weapons to arm his freshly minted minions. After Kyo retreats to his world, the three of them are removed from their shackles and taken to the hospital where they wake up about a week later to a world that blames them for the Spirit Tortoise's rampage.

Volume 10
Upon Naofumi's return from Glass' World and his reunion with Queen Mirella, it is revealed that Motoyasu, Ren, and Itsuki are missing again. After Eclair and the Hengen Muso Master took them out of the Spirit Tortoise, the castle doctors took care of them and cured their weakened state, nevertheless, the heroes remained unconscious. A week before Naofumi's return, Motoyasu and the other heroes woke up and learned of their defeat and captivity at the hands of Kyo and the fact that they were rescued by Naofumi. The realization of their failure shocked them greatly and shortly after they escaped from the castle using their teleportation skills.

Volume 11
Weeks after the events of the Spirit Tortoise incident, Motoyasu finally caught the ear of one of his companions, Elena, looking after her family store. Motoyasu rushed to her side and, to his surprise, learned that Elena was tired of adventuring and now wanted to keep a low profile, living a nice comfortable life despite it being boring. When Naofumi came to talk to him, Motoyasu was shocked and confused, so he used the Portal Spear to escape from Naofumi before hearing him out.

Motoyasu also managed to find Malty along with Lesty. But to his shock, they were with the Sword Hero Ren. Malty was feeding lies to Ren and deceiving him and used the Sword Hero to escape from both Motoyasu and Naofumi. In the end, Motoyasu finally realized how much of a fool he was to believe in Malty and fell into depression, not knowing that these events had caused his Legendary Spear to unlock the Lust Series.

Betrayed and disowned by his former companions, Motoyasu had lost all motivation. Naofumi tried to cheer him up by bringing him to a bar, but Motoyasu had neither the will or the strength to resist and let him do as he pleased. Because Naofumi had no idea how to cheer him up, Filo took on the challenge of trying to cheer him up, after multiple attempts, Motoyasu finally broke out in tears and held his face to Filo's chest sobbing.

Thus began his deranged love obsession for Filo. Filo eventually separated herself from Motoyasu utilizing a cliff at the cost of a great many of her feathers, though Motoyasu merely camped outside of Naofumi's room, what's worst he has gone completely insane seeing any non Filolial woman he encounters as nothing more than a humanoid pig and calling Raphtalia a Tanuki-Pig. The group decides to escape the insane stalker via their window though he instead simply camps out in their carriage.

When Motoyasu realizes that Naofumi's group isn't coming, he instead gets to work. He applies the reinforcement methods Naofumi told him about to his newly unlocked Lust Spear, which aside from the high stats expected of a cursed weapon also has the effect of dramatically augmenting the specs of those affected by lust, chiefly himself, as well as awakening the feeling of lust in those around him. Also remembering what Naofumi said about raising Filo, he buys and raises three Filolials for himself and gives them Naofumi's carriage.

Now dramatically stronger, Motoyasu also remembers that Naofumi said they needed to find and capture Ren thus Motoyasu began hunting his fellow hero who also unlocked his own Cursed weapon, Greed. Not that Motoyasu noticed, the stats from his cursed weapon that he fully reinforced vastly outstrips Ren's. That said Motoyasu's brawl with Ren was interrupted by Naofumi's group's arrival and the appearance of two otherworldly reincarnators and quickly demonstrates his power by dispatching them.

Likewise, Naofumi's group also subjugates Ren, so Motoyasu having deemed his work done calls over his Filolials, with Filo's carriage, before taking off again.

Volume 12-14
Motoyasu has been quite busy since he fought Ren, to put it mildly. For starters he tricked out Filo's carriage with a large amount of technologies from his world and given it a gaudy paint job styled after Filo. After that he worked to raise a veritable horde of Filolials and at their request started a Filolial street racing circuit, stealing wagons and carriages from merchants and then once they're used up sending them back filled up with gold and other valuables.

Secondly he's also been fending off attacks on Naofumi's village by The Church of the Three Heroes remnants, Q'ten Lo Agents and reincarnators. Aside from that he's also been learning Melromarc's language and proper magic using the cheat sheet Naofumi had in his carriage and, presumably with the aid of his birds, has also been learning the Hengen Musou style.

He's also near constantly had the Lust Spear out ever since he unlocked it which in turn has only been continuously sending his sanity down the drain. Eventually he's managed to make such a huge pest of himself that both Fitoria and the Queen puts in a request with Naofumi to track down the source of all the chaos he's been causing.

Volume 15
Naofumi puts together a group and tracks the epicenter of Motoyasu's chaos to a mountain range where he's made his base of operations and where he challenges Naofumi to a race with Filo as the prize. Though Motoyasu's carriage as the superior engineering installed, has a head start and he and his birds know the mountain trails like the back of their hands Naofumi's use of superior magic and use of several carriage wrecking short cuts narrowly nabs him victory.

Ever the sore loser Motoyasu attempts to use the Lust Spear IV to forcibly impart his feelings on Filo. Not only does he fail to seduce Filo in this manner but Raph-chan nullifies the effects of Motoyasu's brainwashing on her. Instead Motoyasu's mounting feelings of Jealousy mixes together with his lust and produces the Lust-Envy spear IV, which then spectacularly backfires when it sets off the jealousy Motoyasu's followers feel towards Filo and he has to defend her from them.

Unfortunately Naofumi can do little to help Motoyasu as Atla's intense feelings of jealousy towards Raphtalia is also set off by the curse and they start fighting. Eventually Naofumi gets Filo to list off a series of demands to Motoyasu the most important being to switch out his cursed spear, stop chasing after her until the waves are over and always do what Naofumi tells him to. The demands are enough to get the situation to calm down with Motoyasu declaring that he's moving into Naofumi's village as soon as he gets his things put together.

True to his word Motoyasu quickly moves into the village, and takes over the new monster stable Naofumi had put up earlier in the week with all of his Filolials inside quickly chasing after Naofumi. Later on Motoyasu joins Naofumi and the others during one of their regular trips to Cal Mira to get their curses treated and Ren takes the opportunity to host another Four Heroes council.

There Motoyasu explains/brags about all of the things he's been doing the past several months and reveals that he's copied a Spear from Q'Ten Lo with a skill called 'Brionac' which the others remember as one of the more powerful abilities that the Pope used against them when the Three Heroes church tried to kill them all. He also reveals that he's learned his own 'Hero Magic' from the Cal Mira monument 'Absorb' which nullifies incoming magic and adds it's power to his mana pool.

As for battle preparations Motoyasu uses his birds to run off to the sight where the battle with the Phoenix is set to be held so that the rest of them can have more time to prepare. During the battle itself Motoyasu largely spends the battle attacking the higher of the two Phoenixes with magic attacks before switching over to the lower one. After the detonation of the Phoenix and the subsequent absorption of Atla into Naofumi's shield Naofumi re-enters the battlefield, restrains both phoenixes, orders everyone to dump their strongest attacks down on the heads of the birds and they finally die.