Akio plays Yume's best friend since childhood. Since they were kid's Akio has always had Yume's back. He is very protective and loyal to his friends. However, Akio is very Narcissistic and has only let Yume in as his best and only real friend. Usually Akio is a very laid back character and finds joy in targeting people to tease and mess with. At first you see Akio picking on Azuna when she comes into the picture but later targets Chii as he makes fun of her for being short and messing with her hot temper. He is also very much a ladies man as you see him try to "hook up" with various women but he has never gotten in a serious relationship after a bad experience two prior to the series.