Rishia Ivyred/Chronology

Volume 4
Rishia was present in the story from the time of the Third Wave, she wasn't that visible as a character.

Volume 5
During the Cal Mira Island Arc, she saves the heroes in a losing battle against the people from the other world using a dud barrel bomb filled with Lucor fruit, dizzying all other entities with the exception of Naofumi.

Volume 6
After the event, the Queen praises and acknowledges her efforts, but Itsuki, bitter about his easy loss at the hands of the enemy, is angered that his subordinate is getting more recognition than he is. This pettiness is later revealed to be Itsuki's true reason for kicking her out of his party, as he knew that she was merely being framed by his fellow party members. Itsuki falsely accuses Rishia of breaking Itsuki's bracelet that he got from Sweed which deeply upsets her. Everyone in the party including Itsuki shuns her out of the party. She responds by trying to commit suicide only to have Filo save her. Naofumi demands an explanation of Itsuki, only to be told that he was caring for her, since she was not suited for fighting.

Running into the sea in hopes of dying, Rishia's suicide attempt is foiled by Filo and Naofumi, wherein the latter convinces her to keep living after seeing himself in her. Naofumi is outraged that she is being falsely accused and asks her to join his party in order to become stronger. She hesitantly does so for Itsuki's sake. She is level 68 when she joins the party so in order to compensate for her lower level, she is asked to wear the Penguin Plush. Despite everything, Rishia remains devoted to the Bow Hero and hopes to someday return to his side.

Naofumi asks her to consider becoming his because he has an ability that boosts the growth of his slaves called Slave Growth Correction ability. He also learned of a way to reset her level/stats/class up a choice from the queen which he also offered to do for her. After considering it heavily, she decides to trust him and become a slave. Soon after accepting, a High-class slave crest was engraved on Rishia’s chest. Just like with Bitch, after a while it became invisible.

Volume 7
While training with an old adventurer, it was revealed that despite her initial poor combat abilities, Rishia has a hidden talent in the style of Hengen Muso. She then started training with Elrasla to become a Hengen Muso master in her own right.

When the Spirit Tortoise appeared, Rishia was the only to recognize the Guardian Beast and provided. With Ost's help, they were able to provide a plan to defeat the walking disaster. She joined part of the invasion force heading into the Spirit Tortoise and together they were able to kill it. She then joined the heroes to confront the villain behind the Guardian Beast's release - Kyo. While she was initially seen as the weakest member by far, Rishia was able to use her Hengen Muso abilities to create an opening to defeat him. As he escaped to Glass' World, Rishia chased after him but ended up trapped in the Infinite Labyrinth with Naofumi.

Volume 8
Thanks to Naofumi using a magic-breaking technique, he, Rishia and Kizuna were able to escape the Infinite Labyrinth. They then rejoined with the heroes from both worlds.

Volume 9
As the heroes stormed Kyo's compound, he used an ability-rated attacks to stop them in their tracks. Due to her low stats, Rishia became his natural opponent and the only person able to move. Using her Hengen Muso abilities, she was able to fight Kyo by herself. She defeated Kyo's experimental bodyguard Albert before the other heroes were released to join the fight again. Together, they were able to defeat Kyo and release the Spirit Tortoise's protective energy back to their own world.

Volume 11
Rishia continued to receive training from the Hengen Muso master and started to become quite proficient at it. In addition, as soon as Rishia reached level 71, her initially terrible stats skyrocketed. As she continued to level up, this incredible jump in stats continued until Naofumi started to actually see her as a competent fighter.

Volume 12
As Naofumi brought his slaves to the Zeltoble coliseums to train, he and his party found Itsuki. He had been manipulated by Malty to fight for money and had his curse series weapon unlocked. Rishia notices that Itsuki seemed troubled and convinced Naofumi to try to help him. Together with the slave trader, they set up a fake fight to confront him with Rishia as his opponent. Even with his curse series weapon, Ituski is skillfully outmatched by Rishia. At the same time, Rishia tried to talk to Itsuki to make him listen to reason. During the fight, the spirit of the Vassal Projectile selected Rishia as its new wielder and Itsuki is defeated.

After the defeat it is revealed that Malty and her group had left Itsuki in a massive amount of debt from their luxurious lifestyle. Rishia offers to take on the debt but Naofumi does instead. As the after-effects of using the Pride curse series starts to suppress Itsuki's sense of self, Rishia then takes care of him.

Volume 13
As Naofumi heads to Q'ten Lo to stop the assassins from attacking Raphtalia, Rishia and Itsuki join him.

Volume 15
Rishia joined part of the united effort to directly fight against the Phoenix. Thanks to Atla's sacrifice and teamwork, they were able to defeat the twin birds.

Volume 16
After hearing about the Vassal Whip hero defeating Kirin near Faubrey, a diplomatic group including Rishia travelled to Faubrey. It turned out to be an ambush by Takt. They group was only able to escape due to Raphtalia staying behind to cover their exit.

After Takt officially started his campaign to take over the world, Rishia joined the forces meant to directly oppose the bulk of Takt's forces. Led by Trash, the group had great success. After the Vassal Weapons were liberated from Takt by Naofumi, the physical part of the Vassal Projectile flew to Rishia and she finally possessed the complete weapon.

Volume 17
After Ethnobalt escape to Raphtalia's World to warn about vanguards of the waves, Rishia, along with many other heroes decided to travel to that world to prevent it from being destroyed. They were able to recover L'Arc's Vassal Scythe and then learn about Kizuna's kidnapping.

When the heroes storm the enemy Vassal hero Miyaji's compound, they are all separated. Naofumi, Itsuki, Raphtalia and Glass are the first to confront the enemies but eventually reinforcements, including Rishia, trickle in. Rishia helps Itsuki confront Mald - n previous companion who underestimated both of them - and they eventually defeat him. However, S'yne's Sister steps in and rescues the villains before they could fully be dealt with.

After rescuing Kizuna, Itsuki reveals that his curse that stripped him of his personality had been lifted. However, it seems that he and Rishia are both interested in each other and he decides to stick with her.

Volume 18
After retrieving an ancient tome from the Ancient Labyrinth Library, Rishia and Ethnobalt translate it and discover the true nature behind the Waves of Calamity.