Role: Obstacle (by Ayano Aishi).
Class: 2-1.
Club: No Club (currently), Martial Arts (formerly).
Persona: Protective, Heroic, Social Butterfly (week 2 onwards; if Osana was a friend of Ayano or is dating), Depressive (if Osana is dead or if Osana is missing).
Reputation: +17
Liked: +30
Respected: +15
Feared: +5
Crush: None.
Strength: Invincible, very strong.
Osana Najimi's best friend. The two spend almost all their time together. She was the leader of the Martial Arts Club last year.