Ikkuu Ameya

No. 10 of UQ Holder’s immortal squad, Numbers. Unlike the other members who achieved immortality through supernatural means, Ikkuu obtained his through science. At the age of 13 he fell into a coma for 72 years-- to keep him alive, he was turned into a cyborg. Although he is legally 85 years old, he still has the mentality of a 13 year old, and prefers to use the body of a 24 year old.

He is the son of the head of the Ameya Concern, a company that builds robots and spaceships. It can be assumed Ikkuu's family and the Concern are responsible for his robotic body, but this has yet to be confirmed.