|Anime Debut||Season 1 Episode 8: Freshman Reception! (mentioned)|
|Also Known As||Akai-sensei|
Akai (surname) is a teacher at the Sakuragaoka High School. The teacher was mentioned in the episode Freshman Reception!, when the school's students informed themselves about their new classes. Akai was mentioned to be the homeroom teacher of one class, much to the discouragement of one student, which could mean Akai is not very popular at the school.