At first, he wore the ceremonial cloak and the Six Shou facial mask but, after his comrades submitted, he cast aside those clothes to dress in a white gown that resembles a jumper, with a pair of heels for decorative reasons. Finally, Ikisu wears a one-winged nose peg, hinting the fact that he can't smell. Though he appears as a calm, beautiful young woman, he sometimes drops this appearance to show a snake-like appearance with wide demonic shaped eyes. It reveal that his appearance is suppose to be identical to his mother.
Ikisu is seen to have a split personality. Mainly Ikisu act wisely feminine in a fearful way leading to people whether or not Ikisu is female or male. He shown a intense grudge against foul scent due to his shallow past. Compared to his colder and boastful comrades, Ikisu pretends to act like a charming young woman to mislead his victims. Once angered he drops the formalities and loses all self-control, going on full-scale attacks.
Ikisu is of French origin as revealed by Ameeno. As a child, Ikisu had to do jobs such as chimney cleaning and selling things on the street. He is also beaten up by an unknown man, possibly his father or guardian 'every night' as it says in volume 22 during a flashback. He has a mother named Mathilde who he requests to meet who rejects him and claims she does not know him. He is then kicked onto the street and told to 'Crawl back to your sewer, you smelly urchin.'