Luck Voltia is a young man of short stature with messy blond hair that covers his ears and forehead, and piercing light blue eyes. He wears an aqua-blue tunic with long, loose sleeves and teal pants with striped stitch patterns at the sides. His expression is almost always a wide, unsettling grin, reflecting his near-sociopathic personality. Luck lives for the thrill of battle, becoming ecstatic at the chance to fight and often suggesting pushing opponents to the brink of death without losing his smile. This earned him the nickname "Smiling Battle Maniac." Though he originally insisted on solo victories, his time in the Black Bulls and encounters with Asta have slowly taught him the value of teamwork—though he still craves a good fight above all else.