八代学
[[Fujinuma Satoru]]'s elementary school homeroom teacher in [i][[Boku Dake ga Inai Machi]][/i].

[spoiler]Actually a serial killer and the murderer of the three children. Tries to murder Fujinuma and puts him into a coma for 15 years. Killed Fujinuma's mother in the original timeline.[/spoiler]
yashiro gaku