The new homeroom teacher for the user's class. Always wears glasses and a hat. Gets angry for completely irrational reasons. Selfish and never changes his mind. Constantly makes mistakes when grading tests. His handwriting on the blackboard is illegible. He is terrible at teaching.

Ryu's best friend. A university sophomore in Class 2-A.

Named after Da Vinci. He is actually a good artist, but he always drops his brush and ruins the work. He constantly gets paint all over his students.

Named after 'Melody'. Can play almost any instrument but is tone-deaf. He is clumsy with percussion instruments and breaks them often.

The school principal. His speeches are incredibly long.

Named after Usain Bolt. He is fast but frequently injures himself.

A good cook, but never wears a mask while preparing food. Often sneaks bites of the food. Reuses kitchenware without washing it.

The ALT (Assistant Language Teacher). Has great English pronunciation. Only holds a Grade 5 Eiken certification.