Homeroom teacher

The homeroom teacher ( tannin) is a character in the Toei Yu-Gi-Oh! anime. He is a teacher at Domino High School.

Biography
While Hiroto Honda boasted of his custodial duties, unaware that the classroom session had started, the homeroom teacher, asked if he could interrupt. He then introduced, Seto Kaiba, as a new transfer student and instructed him to sit next to Yugi Mutou.

When Honda took a day off school to take care of Miho Nosaka's Digital Pet, the homeroom teacher noticed his absence and was flustered to receive a note saying that Honda was on maternity leave.