Kazuma Akazawa

Kazuma Akazawa, is the older brother of Izumi Akazawa.

Personality
He is mentally unstable and he often locked himself in his room, hitting and banging the wall.

Plot
Kazuma appears in the manga chapter 11, he is shown hitting the wall with his fist, creating loud noises. In Chapter 14, he sneaks out his room to get some food and broke the plate instead. This alert Izumi and she walk out the room to check on him. As soon as he saw Izumi,he murmured Izumi's name and fleed back his room, continued creating noises. Later in Chapter 17, he commit suicide by hanging himself in his room.

In the anime, one of the class list of 1996 has Kazuma's name on it and this could indicate that Kazuma is dead in the anime.