Female. Denji's first buddy and the Blood Fiend (formerly the Blood Devil). Her ability is to create weapons using blood. However, if she runs out of blood, she collapses from anemia. Conversely, if she drinks too much blood, she grows an extra pair of horns on her head. Her hair is an orangey-yellow, and her eyes are yellow. She is incredibly beautiful. She fights with Denji often, but they have great chemistry. She uses informal speech and often acts like a child. Her speech style is bombastic and eccentric. She is part of Public Safety Special Division 4. She has a pet cat named Meowy. She is 170cm tall and lives with Denji and Aki. She hates vegetables.

Male. He was Himeno's 6th buddy. He has contracts with the Curse Devil, Future Devil, and Fox Devil. He is very handsome, has navy blue hair, and wears it in a topknot. He smokes a lot. His family was slaughtered by the Gun Devil in the past, so he became a Devil Hunter to seek revenge. He is approximately 20 years old and 183cm tall. He has a blunt personality and quietly gets his work done. His weapon is a sword (Curse Devil). He lives with Denji and Power and cooks for them. He rarely uses profanity.

Male. He made a contract with Pochita (the Chainsaw Devil) to show him his dreams; in exchange, he can transform into Chainsaw Man by pulling the cord on his chest. He can no longer see his former friend Pochita. He is obsessed with girls and spends all day thinking about lewd things. He has orange hair and brownish eyes. He is handsome, 173cm tall, and 16 years old. He has shark-like teeth. He is part of Special Division 4 and lives with Power and Aki. He is a total simp. His buddies were Power (first) and Beam (Shark Fiend, second). He eats anything. He fights with Power frequently, though they sometimes have good chemistry.