Tsubouchi Chitan

Japanese name:	坪内 地丹
Nickname:	Footman

The smallest member of the Science Club who is instantly recognizable by his thick glasses. Chitan is pretty much everyone's personal punching bag, and was decided to be an "underling" by Kaizō, a role that Chitan more often than not actually slips into. He can often be seen wearing weird "underling suits". He also likes trains very much.

Wikipedia