Contracted with the Angel Devil. He is male. His personality is somewhat eccentric, yet gentle and kind. Age: Unknown. His fighting style involves summoning long spear-like weapons to attack his opponents.

Contracted with the Chainsaw Devil. He can transform into Chainsaw Man by pulling the cord on his chest. His fighting style involves shredding enemies with chainsaws. His personality is a bit unhinged, or to put it another way, he's an idiot. He is obsessed with girls, though he doesn't explicitly try to show it. However, because he is so blunt about his feelings, it's obvious anyway. Age: Unknown. He is male.

She is a Fiend, specifically the Blood Devil. She fights by bludgeoning enemies with a hammer made of solidified blood. She is female. Age: Unknown. Her personality is just like Denji's—an idiot who avoids responsibility, lacks social skills, and acts exactly like a child. (Her sense of camaraderie isn't particularly deep either.)

Contracted with the Fox Devil. When he makes a specific hand gesture and says "Kon," the Fox Devil identifies and swallows enemies within the range of that gesture. In exchange, he must give up a part of his body. His personality is cold and composed, but he is sincere about looking after his comrades. Even though he grumbles when Denji and Power do weird things, he gets along well with the team.

(Details are limited, so I will write based on what is known.) She is female. Age: Unknown. She is human. She has a secretive relationship with Denji. Her personality is kind toward Denji and generally friendly to other colleagues, but she can be cold at times. (She is the leader of the group.)