Devils are generally large and humanoid in appearance with pointed teeth, horns, tails, and bat-like wings. Every devil seen so far has access to particularly formidable and frightening magic attributes, such as Anti Magic, Kotodama Magic, Curse-Warding Magic and Gravity Magic.
Normally, devils cannot appear in the living world on their own. A mage can use Forbidden Magic and a sacrifice to summon a devil and use its power. Devils cannot wield or enter a grimoire until it has a five-leaf clover. Once they have a grimoire and a physical body, they can unleash their true forms and power in the living world.
Devil hosts 「悪魔憑 Akumatsuki」, or devil-possessed, are humans who directly share power with devils. The host gains an immense boost in power and the ability to use the devil's magic attribute in addition to their own. When the host draws on this power, the host's body takes on devil-like physical characteristics, such as horns, elongated canine teeth, pitch black skin, clawed fingers and toes, bat-like wings, and a long thin tail. However, it is impossible for a human host to access 100% of their devil's power, unless a direct channel is opened between the living world and the underworld or the devil inhabits a five-leaf clover grimoire.A devil host can also share some of the devil's power to their underlings. While these underlings cannot use as high a percentage as a devil host, the boost to their magic power still makes them formidable mages.
- ↑ Black Clover Manga and Anime — Chapter 1 (p. 47-48) and Episode 1.
- ↑ Black Clover Manga and Anime — Chapter 196 (p. 6-7) and Episode 115.
- ↑ Black Clover Manga and Anime — Chapter 222 (p. 13) and Episode 127.
- ↑ Black Clover Manga and Anime — Chapter 198 (p. 4-5) and Episode 115.
- ↑ Black Clover Manga — Chapter 243 (p. 6).
- ↑ 6.0 6.1 Black Clover Manga — Chapter 235 (p. 7-8).
- ↑ Black Clover Manga — Chapter 252 (p. 5).
- ↑ Black Clover Manga — Chapter 242 (p. 18-19).
- ↑ Black Clover Manga — Chapter 256 (p. 3).