|Light Novel||Volume 1|
One of the former residents of Nanana's room. Juugo finds a hidden manual that Kasumi left behind instructing him how to deal with Nanana. It is said Kasumi one of the founders of the Adventure Club.She was the previous club president.
Nothing much is known about her except that she was the President of the First Gen Adventure Club.
An adventure loving woman.She created the Adventure Club for the sake of adventure.