Justice Devil

The Justice Devil (の) is a Devil that embodies the fear of justice. They were allegedly the unseen overarching antagonist of the Justice Devil arc and a major antagonist of the Falling Devil arc.

Appearance
The Justice Devil appears as a large, caterpillar-like monster with no eyes nor nose and stone-looking pads on its shoulders.

Personality
Nothing is known about the Justice Devil's personality.

Justice Devil arc
On her way to visit Bucky's memorial along with Mr. Tanaka and Asa, the class president uses a contract, claimed to be with the Justice Devil to transform into a being made of muscle and attempt to kill Asa. The class president is later killed along with Mr. Tanaka by the War Devil after taking Asa's body.

Later, Yuko is also tricked into making a contract with what she thinks is the Justice Devil, which allowed her to read Asa's mind. After being defeated by Chainsaw Man, Yuko later warns Asa that the "Justice Devil" is still at Fourth East High School, possibly having made contracts with other students.

Falling Devil arc
Justice Devil is summoned from Hell by the Falling Devil to be fed with a series of dishes she'd prepare, but as they're turned into tasting like fecal matter by Nayuta, Falling Devil is enraged and kills her customer.

Following the attack and the gradual rise of the Chainsaw Man Church, a person claiming to be Chainsaw Man appears during a press conference declaring that he has made a contract with the Justice Devil.

Current arc
It is revealed that higher-up members of the Chainsaw Man Church can transform into devils, also claiming to be using the power of a Justice Devil contract. However, later it is revealed that Justice Devil already died during the Falling Devil's attack, thus their contracts couldn't have been with the Justice Devil. The culprit behind these and previous contracts is currently unknown.

Abilities
As a Devil, the Justice Devil possesses all of the standard Devil abilities. During the battle against the Falling Devil, the Justice Devil has proven itself to be exceptionally powerful, forcing even Chainsaw Man to flee from it.

Devil Powers

 * Immense Speed: The Justice Devil was easily able to keep up with Denji and Asa, even whilst they were escaping on the Super Chainsaw Man Motorcycle.
 * Immense Strength: The Justice Devil was able to effortlessly rip through entire buildings and crush cars using it's tentacles. It also managed to knock Chainsaw Man unconscious twice.
 * Regeneration: The Justice Devil was able to endlessly regenerate it's lost tentacles.
 * Shapeshifting: The Justice Devil was able to transform it's limbs into giant hammers, as well as create a new, enormous jaw on it's belly.