He is Chiaki Takahashi's little brother in the Sket Dance franchise.
In the Otaku and Occult Date episode (anime only), Chiaki mentions her brother wants a Pelorin doll because it looks like their mother.
He is created by Kenta Shinohara, and he has no information regarding any inspiration used to create him. He first appears in chapter 13 of volume 2 and episode 21 of Sket Dance. His seiyuu is Mika Teratani.