|Full Name:||Kotori Monou|
|Family:|| Seiichirou Aoki (uncle)|
AnimeHe was killed by a powerful blast by Fūma.
He is brutally decapitated by Fūma while protecting Hinoto.
Saiki and Kamui initially do not get along very well, as the stoic and strictly by-the-rules Saiki was not completely convinced that Kamui was the one on which the fate of humanity rested; later, they understand each other better and become friends.
Saiki lives to protect Hinoto, whom he seems to have affections for.
In Tsubasa, he appears as Subaru's replacement as a fighter of the Tower faction in Tokyo.