種茂 繁

A science teacher.

He has a gloomy aura and spends most of his time holed up in the science preparation room.

He is mostly ignored by the students.

He has a surprisingly good physique.

When he was in high school, he was bullied by Jounouchi and his group until Hiiragi's sister intervened.
Later, he joined Jounouchi's group and took part in the rapes of Hiiragi's sister.