Diablo

Diablo possesses a sleek and intimidating appearance, characterized by short black hair with striking red streaks in his bangs, as well as piercing black eyes with vertical golden pupils that reveal his demonic nature. He wears a sophisticated black butler-style suit—complete with a white dress shirt, bow tie, and immaculate white gloves—and sports long, sharp, dark-colored nails; his expression shifts between refined courtesy and a sinister smile, perfectly reflecting his obsessive devotion to Rimuru Tempest and his devastating power as a Primordial.