Hashiratani, Kogorou

柱谷小五郎

Ryouta's uncle is a genius researcher who worked as a doctor at a local university. He refused to use any form of transportation, so he rejected all invitations from outside the campus. After witnessing the magician's magic, he accepts Ryouta's request to analyze the compound and produce the medicine needed for magicians.
It was later pointed out that he and Chisato attended the same university and were even classmates.