Liebe

The devil resides within Licht's former grimoire, which is currently Asta's grimoire. It is the source behind Asta's Anti Magic weapons.

Appearance
The devil is a large, black figure with wings, horns, a tail and pointed teeth.

Personality
The Creature Is actively rude, antagonistic, and prideful enough to lecture a demon who it labeled as it's senior for losing. It actively seeks to control Asta's body, and tempts him for its power in multiple episodes

Biography
Sometime after Licht's corruption and death, the devil enters the elf's five-leaf clover grimoire. Centuries later, the grimoire appears to Asta, who uses the devil's Anti Magic to defeat Revchi.

When the Witch Queen removes Asta's limits on Anti Magic, the devil tries to take over Asta's body. It tries to convince the boy to give up and let it control his body, but Asta refuses.

Months later, the devil mocks the other devil after he is slain by Asta.

Magic

 * Anti Magic: The devil uses this unique energy to nullify magic.