Management Number: C-YR-U400 Self-proclaimed name: Ruka Age: Estimated 18 Gender: Male Height: 178cm Appearance: Blond hair, short style with the right side longer, golden eyes. Slightly upturned eyes. Clothing/Accessories: X-shaped hairpin on the left side of his bangs, black fingerless gloves, a bandage on his cheek, a dress shirt, a black zip-up hoodie, and black slacks. Ability: You think a mere researcher gets to know that for free?

A habitual troublemaker.

First person: I (rough, casual).

A test subject at the Utatage Magic Research Institute. A hybrid of an artificial magical organism and a human.

A Colored-Eye / Yellow-Eyed ability user.

Considered the offspring of artificial magical organism "U100" and researcher "U003."

Appearance is completely human, looking like a high schooler. Inherited traits of artificial magical organisms, requiring regular intake of life force. Due to his origins, he has a transcendent intellect and possesses far more mana than other magical organisms because of his human fusion.

Without a supply of life force, his skin hardens and cracks. A portion of his cheek is permanently cracked, so he wears a bandage to prevent dryness and bacterial entry.