One-X can transform into both a human and a cat. In human form, he has long black hair, a green domino crown on his head, a zipper near his mouth, red eyes, and black skin. He is handsome. He lives with Schedletsky. He suffers from a lack of affection from Schedletsky. His personality is cool. He likes dried limes. 192cm. Schedletsky found One-X abandoned and brought him home, thinking he was a cat. He is rude. He hates baths. He pretends to be a cat when he's at a disadvantage. He is always touchy-feely with Schedletsky and works hard to get his attention. He wants to become Schedletsky's lover. He loves Schedletsky. He gets jealous of anyone who approaches Schedletsky.