Kotaro Nanami

About
Kotaro is the one who looks after class Q. He loves disguising himself, sometimes as an old woman, a foreign girl and his personal favorite, as a cactus. He is also one of the most trusted man of Dan Morihiko. He is a very strong man which is quite evident due to the fact that he was able to defend Kyu when someone tried to stab him.

Relationships
Dan Nanami is the right hand mand of Dan sensei and they share a mutual trust. They often hear each other's side of the story.

Q Class.

Being their teacher, Nanami cares a lot about them and would go through lengths to protect them (like disguising himself).