Fuu

Fuu may seem familiar to you, but she has no idea who she is. She doesn't remember anything about herself, not even her name. She's usually optimistic and enthusiastic, but her amnesia makes her more cautious than usual.

Spoiler

Her real name is Kaede Akamatsu. However, she is not the same person as Akamatsu Kaede. Instead, she is a copy of the original who gained the original's memories of the 53rd killing game by accident.