Curse Devil

The Curse Devil (呪いの悪魔, Noroi no akuma) is a devil that embodies the fear of curses. The Curse Devil has a contract with Aki Hayakawa.

Appearance
When summoned by Aki the Curse Devil manifests as a large two-headed skeleton with horns on its monstrous skulls and a large distended ribcage.

Whenever it speaks to someone the Curse Devil appears as a dark pair of lips hovering in darkness or a s a monstrously large mouth.

Personality
The Curse Devil's personality is currently unknown.

Eternity Devil arc
Aki considers using the Curse Devil's sword to defeat the Eternity Devil but Himeno restrains him with the Ghost Devil's arm.

Katana Man arc
During his battle against the Katana Man, Aki pulled out his Curse Spike to pierce Katana Man's body three times. This trigger served to summon the Curse Devil on Aki's behalf who manifested behind the Katana Man and picked him up before biting him and killing him.

Aki later assk the Curse Devil has much life span he has left after using the Curse Devil's power, and the Curse Devil states that he has two years remaining.

International Assassins arc
Tolka's master uses a nail to stab Denji three times without him noticing. She explains her contract with the Curse Devil to her apprentice and entrusts the fourth and final stab for him to perform as a test. If he succeeds then she will reveal her other devil contracts to him.

Abilities
Blood Consumption: As a devil, the Curse Devil should be able to restore its health by consuming blood.

Revival: As a devil, the Curse Devil should revive in Hell after being killed effectively making it immortal.