Motoharu Kaidou

Japan BABEL High School
CLASS A 

The laid-back, troublemaker student who declared himself as "leftovers" of Class A. Despite meeting Akatsuki a few times, Kaidou declares himself Akatsuki's best friend and calls him "Akkii". He is implied to have ulterior motives, and be very powerful, but so far has refrained from confronting Akatsuki, who he believes has yet to reveal his true strength.