The Wizard King of the Clover Kingdom. He uses Time Magic, but is currently in a weakened state after being turned into a child.

A member of the Black Bulls who has a crush on Asta. She uses Water Magic and possesses immense mana as a royal.

A member of the Black Bulls. Despite having no mana, he received a five-leaf clover grimoire inhabited by a devil. He uses the Demon-Slayer, Demon-Dweller, Demon-Destroyer, and Demon-Slasher Katanas to repel or nullify all magic.

The Captain of the Black Bulls. He uses Dark Magic and is incredibly powerful. His Dimension Slash technique can even cut through dimensions.

A former Wizard King who has awakened from his seal and seeks to destroy the Clover Kingdom with the sword Elsdocia. He uses Key Magic and is a formidable opponent.

Asta's childhood friend and rival. He is the owner of a legendary four-leaf clover grimoire, commands the wind spirit Sylph, and uses Wind Magic. He is exceptionally talented.

Her real name is Secre Swallowtail, and she uses Sealing Magic. A member of the Black Bulls, she once worked alongside the first Wizard King.

She uses Plant Magic and primarily serves as a healer. A member of the Golden Dawn like Yuno, she has feelings for Asta.

The 11th Wizard King who seeks to destroy the Clover Kingdom alongside Conrad. She uses Chess Magic to create countless steel soldiers and manipulate them like chess pieces.

The 16th Wizard King who seeks to destroy the Clover Kingdom alongside Conrad. He uses Barrier Magic.