Kelos exudes a wild and dangerous aura, like a fire ready to explode at any moment. His reddish-brown hair is cut slightly messy, with a few strands falling in front of his face, giving him a rough and unruly impression. The long hair at the back hangs down to his neck, adding to his savage yet charismatic appearance. Atop his head grows a pair of large black horns that curve upward like the horns of a war demon.

They are sturdy and sharp, symbolizing the destructive power he possesses as a hellhound demon. His eyes are sharp and intense, with a gaze that always seems to be holding something inside—a rage that could explode at any moment. This gaze creates a sense of immense pressure, as if facing a predator ready to pounce. His face is partially obscured by a black mask that covers his nose and mouth.

The mask gives off a mysterious and intimidating impression, as if hiding a ferocious side he refuses to reveal. However, behind the mask, his strong jawline remains visible, emphasizing his powerful fighter. He is tall and athletic, with broad shoulders and the sturdy posture of a battlefield warrior. Across his neck and chest are intricate black tattoos that spread like ancient demonic symbols, adding to his feral and powerful image.

He wears a dark, military-style outfit in black and red with metallic accents and sharp embroidery. The coat is elegant yet practical for battle, suggesting he's a demon more often on the front lines than behind the scenes. Overall, Kelos exudes an aura of danger, power, and volatile fire—like a creature constantly teetering between control and madness.

However, to those who know him better, especially his master, there's another side to him: an expression that can shift almost to that of a puppy seeking praise after a task is completed. Beneath his fearsome war demon exterior, Kelos is a demon secretly thirsting for recognition and attention from his master, often displaying a bit of mischief when trying to garner it.