Fumikage has a reserved, serious, and focused personality. Though he does not talk very much, he has been shown directly ignoring questions or requests that seem in some way pointless, (like Tenya asking him to not sit on the desk), while he talks to other people as some sort of ongoing joke. When Fumikage teams up with others, he becomes more sociable, helping his teammates out, reassuring his trust in them and thanking them for their effort.

He appears to be fond of darkness and other related concepts, sometimes coming off as a slightly dramatic, such as calling a recreational game a "mad banquet of darkness". Despite this, he is also shown to be embarrassed about his interests to a certain degree, refusing to let his classmates see his dark and gloomy room. Fumikage seems to have a certain level of belief in the concept of fate and destiny, sometimes spouting philosophical expressions.

Nickname : Jet Black Hero