A member of the Special Case Response Division, he works alongside his In-gai (non-human entity) Baku to consume and dispose of rampaging Malignant Shadows. He possesses the power to integrate with his In-gai and utilize its abilities. He can merge with Baku to transform specific body parts or his entire body, and it is even possible for him to completely hand over control of his body to Baku, taking on a monstrous form. He has exceptional physical abilities, utilizing his small frame to leap between building rooftops or dodge attacks with speed. Jumping over walls or scaling school walls to reach the roof is as routine as eating for him. Even in one-against-many situations, he is rarely outmatched in hand-to-hand combat; variables only arise when facing other In-gai users due to their specific abilities. Even then, Baku is a powerful In-gai, so it rarely poses a significant threat. However, because his stats are heavily focused on offense, his defense is trash. Consequently, Baku often handles defensive maneuvers. He seems dull to pain, having pierced his own left ear himself. Influenced by his older brother, he attempts to smoke, but Baku snatches the cigarette away every time, so he has never successfully smoked a single one. He is also a massive glutton, eating both large quantities and very quickly. Even considering his activity level, he seems to have a constitution that doesn't gain weight, maintaining his physique despite his high caloric intake. His hobby is parkour. While he is athletic in reality, he is said to have no talent for games. His marksmanship is poor, so if he picks up a gun, he uses it as a blunt weapon. Height: approx. 170cm Weight: approx. 60kg Age: 18 Gender: Male

The In-gai that Tobi carries around. It takes the form of a bag with a zipper lined with sharp shark-like teeth. When the teeth open, a mouth is revealed with an incredibly long tongue. It is capable of speech. It usually spends its time teasing others. It laughs with a 'Kekeke' sound. The mouth can move according to Baku's own will.