Was once a normal kid and lived in a rather large family (Older sister - 18, younger sister - 13, younger brothers 10, 6, 1) but contracted the 'hopeless' disease and became a monster.
However unlike the others who became monsters he remembered everything which might have been due that he became a 'hopeless' to protect his family from his sisters boyfriend who had also become a 'hopeless', though it might have been that the 'hopeless' he turned into was a non-hostile monster ('hopeless' are humans who turn into monsters from different dimensions so it's unlikely to be two monsters the same. Humans in this story don't know this though)

He was studied for some time after being captured and after they figured out everything they could from him just being in a large room they sent him to a 'hopeless' fighting school so they could continue the studying from a less controlled environment. His current story takes place there.

He is a rather straight laced child and his interests are books and reading. While he doesn't really show it he is pretty protective of his family. His first name means accurate/correct which fits him but his last name means fortunate which he really isn't/