Izuru is a gloomy and introspective person, not easily able to socialize with others. He generally appears weak and indifferent, leading many to believe he lacks the ability to be a leader. His personality flaws are also assets: his introspection coupled with his tendency to worry makes him indecisive, but it also makes him sensitive to unusual behavior.

Izuru likes to write haiku and he was also awarded for one of his pieces by Seireitei Communication, which is as follows: "The persimmon tree bears fruit. Aaah, the persimmon tree bears fruit again this year." His dislike for dried persimmon (a huge difference between him and his former captain) sheds some light on the background of the poem. He likes agar-agar instead. He also writes a serial novel titled "I Want to Apologize to You." It runs in Seireitei Communication and every new chapter begins with a haiku piece. He is also the author of Kira Izuru's Haiku Time. Izuru also gives a special lecture of poetry on the Shin'ō Academy. It is also known that he is skilled in playing cat's cradle.


"Battle is not a stage for empty heroics, nor is it something to take pleasure in. Battle is filled with despair. Dark, terrifying. That is the way that it should be. That way, people learn to fear battle and to choose the path of non-violence where possible."
— Izuru Kira "Fear for fight