Kyo Ethnina

Kyo Ethnina (キョウ＝エスニナ) also known as the Book Hero (本の勇者) Is one of the Vassal wielders from Glass's World.

Personality
Kyo fancies himself a genius. A rampant egomaniac whenever his opponents make mistakes he will repeatedly call them stupid, yet he makes use of his attacks in extremely simple and easy to see through ways.

He's also a rampant pervert as shown by his openly admitting that he intended to brainwash the members of Naofumi's party and add them to his Harem of other brainwashed women. but refused to take in any woman whom he considers used goods such as Albert's and Trash #2's harem. Like a normal gamer, he calls the waves an update.

Appearance
Kyo has white hair with a silver sheen, his eyes are described as stagnant and rotten comparing them to eyes of a dead fish. There is an air around him that dark and gloomy.

He wears a Long Coat while wearing a strange belt around his chest which are full of test tubes, he also wears leather gloves and shoes. He is described to look either like a scientist or an Alchemist.

After his dead, the remanent of his soul takes the appearance of a skinny man in thirties completely different from his physical appearance, but his voice was the same.

Abilities
He was a genius able to study, control and go around many phenomena, including the summoning of an artificial wave of catastrophe, control spirit tortoise power, etc.

He held the book vassal weapon against it's will and was well versed in using it's power..

Background
He was mentioned to have travel around the world asking people about their troubles and invent way to solve them. He save Yomogi along the way.

Long ago, he built his laboratory in a sealed mansion far away from the capital. it was within a thick fog that anyone wanders inside will be lost unless he wants them to find a way.

Volume 7
Kyo was later discovered to be the true mastermind over the Spirit Tortoise Incident. He was also the reason for the disappearance of the 3 missing heroes Ren, Motoyasu and Itsuki. Kyo exploited the 3 heroes to gain more Spirit Tortoise Energy while in the process giving the Spirit Tortoise more power.

He discovered inside of the Spirit Tortoise at the very core. The Spirit Tortoise's core destroyed by Naofumi, Kyo retreated to his world along with the Spirit Tortoise's Energy.

Volume 8
He manage to split Naofumi and Rishia away from his Party, trapping them in an inescapable labyrinth.

Relationships
Legendary Heroes  Vassal Wielders Companions Others 
 * Naofumi Iwatani
 * Kizuna Kazeyama
 * Glass
 * L'Arc Berg
 * Raphtalia
 * Yomogi Emarl (former)
 * Tsugumi (former)
 * Rishia : Rishia considers Kyo to be the person she could never forgive and believes that of there was a destiny than it was hers to kill Kyo. Rishia unlocks her hidden potential to fight Kyo which made Naofumi to nick name her as Portaganist. Kyo was also easily annoyed by Rishia for her ideals and also for getting on his way. She always managed to spoil his plans on many occasion
 * Filo