TV-Series
Description
Fuegoleon Vermillion is a nobleman and the eldest son of the House Vermillion, one of the royal families of the Clover Kingdom. He initially serves as the captain of the Crimson Lion Kings, a squad of the Magic Knights. In terms of appearance, Fuegoleon is a tall man with purple eyes and long, straight vermillion hair which is neatly combed back. He has distinctive red markings around his eyes and a diamond-shaped mark of the same color on the center of his forehead.

Fuegoleon is known for his fair and just personality, judging people based on their true worth rather than their social status. This trait is evident when he defends Asta against oppression from the House Silva, reasoning that the Magic Emperor acknowledged the young knight's value. He possesses a charismatic and natural leadership ability, allowing him to quickly take charge of situations and deploy orders effectively, even under the pressure of an invasion. Despite being a proud noble who can be angered by disrespect, he remains calm and collected in dire situations, capable of analyzing opponents to find their weaknesses. He is a wise and no-nonsense individual who scolds those who lose focus and offers encouragement to those who need it, such as when he consoles Noelle Silva after she is humiliated by her siblings. His conviction and passion are so pronounced that fellow captain Yami Sukehiro refers to him as the Hot-Blooded Seriousness King.

Fuegoleon's primary motivation is to become the next Magic Emperor, a goal he takes so seriously that he marks himself with the diamond-shaped symbol on his forehead as a vow. He deeply values ambition and a spirit of improvement in others. In the story, he plays a significant role as a respected senior Magic Knight captain. He is present at the Magic Knights Entrance Exam where protagonists Asta and Yuno participate, showing curiosity about Asta's inability to fly on a broom. During the invasion of the Royal Capital by the terrorist group the Eye of the Midnight Sun, he leads the defense. However, he is specifically targeted by the group for the magic stone he possesses. He falls into a trap set by the enemy, who teleports him away and returns him unconscious and missing his right arm, his grimoire beginning to disintegrate. He remains in a coma for a significant period, during which his older sister, Mereoleona Vermillion, replaces him as captain.

His key relationships include his siblings. He shares a strong bond with his younger brother, Leopold, whom he personally trains. He also has a fierce and competitive relationship with his older sister, Mereoleona, which dates back to their childhood and is known for causing massive property damage when they clash. Fuegoleon maintains a long-standing rivalry with his distant relative, Nozel Silva of the House Silva, a relationship that persists even after both become Magic Knight captains. He also has a respected mentor in Sister Theresa, who instructed him in magic. He shows a willingness to support and encourage younger Magic Knights like Asta and Noelle, believing in their potential.

Fuegoleon undergoes a notable development after his near-death experience. He eventually awakens from his coma during the elf reincarnation arc. In a blaze of glory, he returns to the battlefield, having been chosen by the great fire spirit Salamander. This new bond grants him access to Spirit Magic, significantly enhancing his already immense power. His recovery marks a turning point, and he rejoins the fight to protect the kingdom.

As a captain of the Crimson Lion Kings and a royal, Fuegoleon possesses immense magic power capable of creating intense pressure just by being released. He is a master tactician and strategist, capable of finding precise gaps in an opponent's defenses rather than simply overwhelming them with force. His primary magic attribute is Fire Magic, over which he has a high degree of mastery. Using Creation Magic, he can shape fire into various entities, with his signature spell being the creation of a large, powerful lion. Other known spells include Sol Linea, which shoots a laser from a small fireball, and Leo Rugiens, which creates a huge flame lion that burns everything around it. After being chosen by Salamander, he can use Spirit Magic, with Salamander Breath being a notable technique that releases a powerful stream of fire from the spirit. He is also proficient in Reinforcement Magic to enhance his physical abilities and possesses great physical strength, capable of defeating an elf-enhanced opponent with a single punch.