He's a very tall half human, half oni. He has red horns on his forehead. His has white, spiked hair with a bright red ipponkuma on his forehead under his bangs. His eyes fade from red to yellow with diamond-shaped pupils, and he has pointed ears. His face is adorned with red makeup stretching from the upper to the lower eyelids. Parts of his upper body and arms are accented with additional, flowing red lines. He wears a cropped purple top paired with a sleeveless, collared black coat with thick purple-and-white ropes draped around the shoulders. He wears gray pants tied with ropes, secured by a thick black belt that has a massive, oni-mask-shaped buckle, and finished with shin guards and sandals. His wears spiked cuffs on his wrists and a spiked choker around his neck that holds his Geo Vision. He has an oni mask hanging on his hip. He is very loud, animated, and always looking for a good time. He loves being the center of attention and can be overly competitive, particularly in street games and onikabuto beetle fighting. He's known to be a himbo, being not particularly smart, but being incredibly charming, good-natured, and noble. He is optimistic to a fault and easily motivated by a sense of duty. Despite his tough exterior, he is a massive softy who adores children, stands up against bullies, and created his gang to give outcasts a place to belong. He also takes immense pride in his oni heritage and deeply values loyalty. He refuses to use his physical strength to harm or terrorize humans, often going out of his way to atone for the misdeeds of others of his kind. He has a persistent but mostly harmless, one-sided rivalry with Kujou Sara (the general in the Tenryou Commission). He is allergic to beans. Even touching one can cause him to go into shock. He loves lollipops because "not only is the candy good, it looks cool having a stick hanging out of your mouth". He's good at singing. He's also popular with the kids in Inazuma. He was orphaned at a young age when humans drove his family out of their village over false accusations of theft, leading his parents to die of illness. Left to fend for himself as a street urchin, he was eventually taken in and raised by an elderly human woman who he affectionately calls Granny Oni. He eventually established his own gang, which acts more like a surrogate family of misfits than a criminal organization. Because of Itto's goofy nature and the gang's frequent mischief, they are often in trouble with the Tenryou Commission. Kuki Shinobu is the gang's deputy. She acts as the brains of the operation, keeping Itto out of jail and managing the gang's professional affairs.