Pochita

Pochita (ポチタ) is the Chainsaw Devil (チェンソーの悪魔, Chensō no akuma) who embodies the fear of chainsaws.

Appearance
Pochita appears to be a small red canine with a chainsaw like appendage protruding from the center of his head. Handles emerge from his body allowing him to be wielding like a chainsaw and his short tail is in the shape of a chainsaw's pull cord.

Personality
Unlike most devils Pochita communicated solely through barks and whines like an actual dog.

Pochita deeply cared for by Denji, after his life was saved by the human, despite the devil's general hatred toward humankind. He willingly gave up his heart to Denji so that he could fulfill his dreams which Pochita loved hearing about.

History
Pochita initially met Denji after suffering wounds from an unknown source while Denji was visiting his mother's grave. In an act of empathy, Denji offered Pochita his blood so that he could recover from his wounds on the condition that the two would become partners. Pochita would live alongside Denji, assisting him in devil hunting and wood clearing while subsisting on whatever rations Denji could afford.

Intro arc
One day, both are mortally wounded by the Zombie Devil and his Yakuza turned zombies. Pochita would then enter Denji's body, assuming the role of his heart, while repairing Denji's damaged or missing organs and body parts in the process. Pochita is last seen communicating with Denji internally, communicating his wish that Denji show him more of his dreams in exchange for being his heart.

Abilities
Chainsaw Appendage: Protruding from Pochita's head is a chainsaw shaped appendage that functions as an actual chainsaw.

Blood Consumption: As a devil, Pochita can restore his health by consuming blood.

Body Assimilation: Pochita possesses the ability to fuse with a human body seemingly replacing damaged or missing organs. Unlike the process for a devil turning into a fiend by taking over a corpse, Pochita did this to Denji while he was still alive which allows Denji to transform into human/devil hybrid.