Yuto Ijika

Yūto Ijika (石鏡 悠斗) is the older twin brother of Benio. He is also an old friend turned enemy of Rokuro Enmadō, and the mastermind behind the Hiinatsuki Tragedy.

Appearance
Yūto is a young man with blue hair that is kept in a bowl cut hairstyle, he has gold colored eyes and wore an eye patch over his left eye and is seen wearing a white uniform with dark blue designs on the sides of the sleeves and on the zipper.

Before he had an eye patch, he had blue eyes matching the color of his hair.

Two years later, his appearance has not changed except he has gotten taller.

Personality
When he was younger, Yūto appeared as an antisocial kid who was confident in his own power, who saw anyone else in the Hiinatsuki dorm as low level exorcists. To Benio, he was an example as older brother and had a strong sense of justice. This was later revealed to be a cover for him in order to reach his goal.

In reality, he remains very confident in his own power and he feels nothing for his little sister nor Rokuro and didn't hesitate to kill them if he had the occasion, he is cruel and fearless in front of his enemies. He is ruthless and shows no remorse in his actions and even belittled Benio by insulting their late parents who sacrifice themselves to save her while calling her pathetic. He also loves showing off his strength and whenever he has a moment of weakness, he makes it appear like it is a bluff in order to keep his strong image. He does not mind sacrificing countless people to become the strongest exorcist.

Plot
In both the manga and anime, Rokuro and Yūto were friends living at Hiinatsuki Dorm. They were considered to be the exorcists who ends the war with the Impurities. On the day of the Hiinatsuki Tragedy, he and Rokuro fought it out resulting in Rokuro's corruption and Yūto's disappearance. Rokuro meets Yūto again after he is forced to confess to Benio about the truth behind the tragedy. In the anime, Rokuro is shown to have lost his temper and attacked Yūto relentlessly, while in the manga, Mayura was corrupted before Yūto met up with Rokuro. Considering that the Furu no Koto drains their spell power, Rokuro couldn't put up much of a fight in the manga. In the anime, Mayura was corrupted before Yūto's second meeting with Rokuro. Yūto then asks Rokuro to side with him in order to complete his ambition. Rokuro and Benio have been training to fight Yūto (they still have to give each other a signal to activate Resonance). In both the anime and manga, Kamui turned Benio into a Fallen Impurity and she also proved that she could utilize her power enough to land multiple hits on Yūto leaving him bloodied and battered. Later, Rokuro healed himself somehow. In the manga, Rokuro's future child, the Miko, has a chat with him and gives him his spell power so Rokuro gained a new form. In the anime, this was cut out and the transformation only lasted long enough to heal Rokuro's wounds. Working together, Yūto was defeated, however it was a hollow victory as he escaped before telling Rokuro that "I'm going to the island".

Sometime later, he stands among the bodies of fallen exorcists before he believes that he faintly felt Rokuro's presence and wonders how he long he has to wait for him.

When Tenma Unomiya telepathically contacts Rokuro, Yūto manages to detect it before the latter cuts off the connection after realizing this. Now aware of Rokuro's presence on the island, Yūto screams out in joy as he manically laughs at the thought of fighting against Rokuro again.

Powers and Abilities
Yūto is very skilled in exorcism having been a skilled prodigy at a young age. He studied forbidden exorcism in order to increase his power and was successful as his new abilities allowed him to greatly wound and manage to defeat Seigen Amawaka, who at the time was still a Twelve Guardians.

Enchanted Gear: Being an Exorcist, Yūto is able to use Enchanted Gears to help him combat Impurities when fighting in Magano. His Enchanted Gear takes the form of a rocky Blue arm similar to that of an impurity. Yūto is also able to perform a full-body enchantment akin to the Twelve Commanders Celestial Gear Equip.

Regeneration: As a result of his new abilities, Yūto has gain this ability after losing an arm in his fight with Rokuro. Yūto was able to regain it after two years.

Trivia

 * His eye color changed into yellow when he has an eye patch, and eventually gone rogue after the Hinatsuki Tragedy. A same case happened on Braig in Kingdom Hearts game franchise, where he also completely becoming a villain after getting an eye patch and had his eye color changed into yellow.