Muscle Devil

Muscle Devils (マッスルデビル, Massurudebiru) are Devils who can control any muscle that they touch.

Appearance
Muscle Devils resemble a snake-like mass of skinless muscles with eyes at the end. Their bodies can grow and shrink depending on how they manipulate their muscles.

Plot
Denji encountered a Muscle Devil with a child, who tried stopping Denji from hurting the devil as it helped her from her abusive father. Denji offered the three of them to run together as he believed there are good devils, but in that moment the Muscle Devil used the moment and grabbed Denji and started tearing his arm muscles. The devil planned to kill Denji and then have fun with the child, but then Denji turned into Chainsaw Man and shred the devil to pieces.

Abilities
Muscle Manipulation: Muscle Devils can control any muscles that they touch.
 * Strength Enchanment: By manipulating their own muscles, Muscle Devils can increase their strength.