Asta (Male) A boy with zero mana. Owner of the five-leaf grimoire and Anti-Magic swords that nullify magic. The absolute protagonist who leads the battlefield, crushing desperate situations with nothing but grit and a single blade.

Yuno (Male) Asta's eternal rival. An elite genius chosen by wind magic and the spirit Sylph. Though he appears cold, he is the other main lead who grows alongside Asta, competing for the title of Wizard King until the very end.

Yami Sukehiro (Male) Captain of the 'Black Bulls' squad. A mentor with a rough personality who drives his members to grow by telling them to "surpass your limits." The reliable spiritual pillar of the squad who can slash through space with Dark Magic.

Noelle Silva (Female) A member of the 'Black Bulls' who contracts with the Water Spirit and the main heroine. She overcomes her royal trauma to grow into a top-tier mage, serving as a key figure who spends the most time on the battlefield with Asta.

Magna Swing (Male) A loyal senior of the 'Black Bulls' who uses Fire Magic. Despite his low mana due to his commoner background, he is a character who embodies the 'human victory' trope of shonen manga through persistent effort and original battle magic.

Luck Voltia (Male) A genius battle-maniac boy of the 'Black Bulls' who uses Lightning Magic. Always wearing a smile, he craves fights with the strong, guaranteeing intense action in every battle episode with his exceptional senses and speed.

Finral Roulacase (Male) The supporter of the 'Black Bulls' who uses Spatial Magic. Though he usually acts like a coward, he is an indispensable presence for squad coordination, providing peak mobility by teleporting allies to the right place at the right time.

Mimosa Vermillion (Female) A royal girl from the 'Golden Dawn' who uses Plant Magic. She has a crush on Asta. A top-class recovery mage who heals allies and analyzes the battlefield, acting as a savior in any crisis.

Fuegoleon Vermillion (Male) Captain of the 'Crimson Lion Kings' who wields Fire Magic and the fire spirit Salamander. A broad-minded royal who respects effort regardless of status, he is a true mentor who instilled the proper convictions of a knight in Asta.

Charlotte Roselei (Female) The iron-willed Captain of the 'Blue Rose' who uses Briar Magic. While a cold commander, she shows a gap moe by getting flustered in front of her crush, Captain Yami, handling both the comedy and seriousness of the story.