Regulus of Leo

Regulus of Leo, a young prodigy barely in his twenties, is the most impetuous and brilliant of the Gold Knights. Son of Lugonis — Tenma's master — his relationship with his father is complex, blending admiration and incomprehension. His Lion Lightning Fist technique is devastatingly powerful.

Tenma learns that Lugonis, his master, has a dark past tied to Hades — painful choices made in the name of survival. This revelation shakes Tenma but deepens his understanding of human complexity. Meanwhile, Alone advances in his cursed painting, each brushstroke adding a suppressed soul to the canvas of nothingness.