Katori's Brother

Appearance
A boy with dopey eyes accompanied by uneven bangs, a rough bowl cut, and flyaway ahoge; his disheveled appearance is a normal sight.

Personality
Not much is known about his personality.

Background
He is first seen greeting Somei when the latter comes for a visit. He is later seen commenting about changing room with his sister. He managed to survived the First Large-Scale Invasion along with his parents.