He spent much of his time wearing the standard Public Safety Devil Hunter uniform, consisting of a white shirt, tie, and slacks. He wore the uniform carelessly, his shirt wrinkled and sleeves rolled up. After resigning from a Public Safety Devil Hunter, Denji now wears Fourth East High School's uniform, an unbuttoned black buttoned long-sleeved shirt (similar to a gakuran outfit's) and black pants. Near the end of the first part, as well as at the start of the second part, Denji starts growing more ambitious and lavish in his desires; whilst before he was happy with simply being able to eat jam on toast and feeling a girl's chest, now he desires to have steak for breakfast every day and to have numerous, lustful girlfriends. It's also shown he has grown more arrogant in his Devil-slaying, as he is willing to expose his identity if it means he'd get more attention from girls, despite how disastrous the consequences would be.