In his human disguise, Sparda was a tall, handsome man with blue eyes, a young face, and slicked-back white hair. He is shown to have worn a purple Victorian outfit with a white cravat, a large red jewel around his neck, and a monocle over his left eye. While riding into battle on horseback, he would wear armor reminiscent of his demon form.
In his true form, Sparda was a slightly-larger-than-human-sized, vaguely insectoid demon with clawed hands, a scaly hide, a pair of downward facing ram horns, chiropteran wings with beetle-like wings underneath, hooves for feet, and reptilian spines protruding from his back. Parts of his body appeared to be made of grey scales with accents of red and purple. He also had gold veins on his hands and arms, chest, shoulders and back, a red diamond eye shaped gem in the center of his forehead, and skull-shaped gold knees and elbow guards with small horns. His most notable feature were his slit-like eyes, which glowed red and did not have pupils. He is often shown wreathed in fire, although it is uncertain if he was simply impervious to it or if he summoned it.
Although Sparda never actually made an appearance in a game, Arkham temporarily takes his form in Devil May Cry 3: Dante's Awakening and beating Devil May Cry on Hard Mode allows players to replay the entire game as him.