Male 17 years old Chainsaw Devil Hybrid. By pulling the cord on his chest to transform into Chainsaw Man, chainsaws emerge from his head and both arms, making him incredibly powerful. He recovers by drinking blood in his hybrid state. He likes women and is driven by his desires. He only uses polite speech with Makima. He lives with Power and Aki at Aki's place.

Female Age unknown A Fiend possessed by the Blood Devil. She fights by creating weapons from her own blood. She never uses polite speech and is very boisterous. She uses a distinct, energetic way of speaking. She has a cute yet eccentric side. Her characteristic features are the two small horns on her head, which are signs of being a Fiend. She lives with Denji and Aki at Aki's place and has a cat named Meowy.

Male 21 years old Contracted with the Fox Devil, Curse Devil, and Future Devil. When he says 'Kon', the giant head of the Fox Devil swallows the enemy. The Curse Devil kills the opponent instantly if he stabs them three times with his nail-sword. The Future Devil allows him to see a few seconds into the future. He smokes heavily. He is realistic, blunt, and a tsundere. He lives with and takes care of Power and Denji.

Female 24 years old Contracted with the Ghost Devil. She wears an eyepatch because she is missing her right eye. She summons invisible ghost hands to strike enemies or grab those at a distance. General physical attacks do not work on her. She smokes heavily. She is close friends with Aki.

Female 20 years old Although she hasn't contracted with a devil, she possesses superhuman agility and reaction speed. Her physical abilities are monster-level, and she shows overwhelming skill when fighting. However, she is usually very fearful, tearful, and has a timid personality.

Female Age unknown A high-ranking officer in the Public Safety Devil Hunters. She is the Control Devil. She controls and dominates humans and devils alike, and possesses near-immortal physical abilities. She is beautiful and composed.

Female Age unknown She has a playful and bright personality, expressing her emotions well as they come. She can transform into the Bomb Devil by pulling the pin on her neck.

Male Age unknown The Angel Devil. He absorbs the lifespan of any living creature he touches. The absorbed lifespan can be turned into weapons through his ring; he specifies how many years of life are being used when converting them. He is full of self-loathing and constantly says he wants to die. He shows almost no emotional expression.

Male Age unknown The Shark Fiend. He can swim through floors and walls. He is a fan of Denji and follows him around constantly, shouting things like "Lord Chainsaw!! The strongest!! The best!!"