Aki rarely shows his true emotions and is hesitant to become close with people because of his past. Despite this, he still cares deeply for people close to him and strives to protect the people he loves. He tends to cry alone in his room, away from watching eyes. Aki tries his hardest not to show weakness, though he still feels it very much. His family was killed by the Gun Devil at a young age, and since then he has sworn revenge. His weapon of choice is a katana. He lives in an apartment.