Gentleman

Gentleman is an old man who's always gentle to others. His first appearance in the manga is in volume 3, chapter 36, when he hands Nano her hand back.

Appearance
He wears a suit with a blazer and a big hat with Mogura on the top of his hat.

Personality
He is nice.

Kiyoshi
He mistakenly calls him Takashi.

Nano Shinonome
He once helped Nano find a ball that she and Hakase lost.

Mio Naganohara
Mio once kicked him unconscious because he picked up the drawings that she had been trying to hide.