The director of Turtle Academy. He values money more than students. He loathes students who can't study, and hates Ko Kyungtae the most among them. He's a bad guy!!

Byunggu makes Ko Kyungtae his bread shuttle and hits him on the rooftop. However, he doesn't actually hate or despise Ko Kyungtae.

Dislikes Ko Kyungtae. An assistant at Turtle Academy who hands out demerit points.

Byunggu's best friend. He makes Ko Kyungtae run for bread and hits him on the rooftop occasionally, but he doesn't hate Ko Kyungtae.

A teacher at Turtle Academy and the director's cousin. A nepotism hire. He dislikes Ko Kyungtae.

A loner. He is one of the better students in this academy.

A teacher at Turtle Academy who takes good care of the students. The best teacher!!

Good at soccer, but communicates by writing on a sign.

A kind fool. Bad at studying. Poor.

Kyungtae's mother. She is poor. I wonder if she'll even appear in the story?