Smile

Takeru Wato a.k.a. Watson

Japanese voice actor: Ryo Hirohashi
English voice actor: Hopefully, there will be one.

Watson is a classmate of Haru's in the 1st year of secondary school. That would make him 13 as well. He is skilled at technology and games.

Watson has a crush on Eri and is desperately trying to get her autograph.