Kogorou Hashiratani 柱谷小五郎

Ryouta's uncle, a genius researcher who worked as a doctor at a local university. He refused to travel on any transportation vehicle so he rejected all invitations from outside the campus. After witnessing magician's magic, he accept's Ryouta's request to analyze the compound and produce the medicine needed for magicians.

It was later on pointed that he and Chisato attended the same university and were even classmates.