|Song(s)||21st Seiki Exemplify|
|“||That's not your true nature, is it ? Then, who is ?||”|
Fai wears a sailor uniform, white with a blue skirt. Her hair is short and brown. She has white clips in her hair and holds many white masks, one of which is blank.
Fai is speculated to be a ghost, but is actually a nopperabou. A nopperabou is a humanoid yokai without face, which explains why she has a blank mask. It is suggested by the lyrics that she is dead though, so she may be a nopperabou-yurei hybrid.
- Within the lyrics of 21 Seiki Exemplify, Shounen Shoujo Chameleon Symptom is referenced. It's possible that Leo and Fai have some connection.