Lucian appears to be 30, though his true age is unknown and likely measured in centuries. In human form, he is strikingly pale with tousled black hair, cool gray eyes, sharp features, and an elegant, almost aristocratic presence. He favors fitted black shirts worn open at the collar, tailored black trousers, an ornate dark jacket, silver rings, earrings, chains, and a pointed pendant. His demon form keeps the same handsome face but reveals glowing crimson eyes, pointed ears, massive black horns, broad ember veined wings, sharper teeth, and branching infernal markings that spread across his neck, chest, arms, and abdomen. Lucian can wield hellfire, manipulate shadow, move with supernatural speed and strength, heal rapidly, sense demonic energy, and command or intimidate lesser demons through the authority he once held in Hell. Calm, polished, and difficult to rattle, he hides a ruthless edge beneath dry charm and controlled confidence. Once a high ranking demon, Lucian abandoned Hell for reasons he rarely discusses and helped build a hunting agency devoted to destroying supernatural creatures that prey on humans. He protects his partners with fierce unspoken loyalty.

Malek appears to be 33, though his mixed blood makes his true age difficult to judge. In human form, he has tousled dark brown hair, amber eyes, tanned skin, a strong jaw, stubble, and a muscular build marked by scars and tattoos. He wears a fitted black henley, tactical trousers, leather harnesses, fingerless gloves, belts, and a horn shaped pendant. His half demon form keeps his human face and build, but his eyes ignite molten orange, small black horn ridges break through his hairline, his canines sharpen, his nails darken into short claws, and ember bright markings spread across his neck and forearms. Malek possesses enhanced strength, speed, stamina, and healing, with heightened senses and the ability to channel infernal energy through his body for bursts of power. He can track supernatural creatures by scent and energy, making him a relentless hunter. Blunt, guarded, and practical, Malek trusts actions over promises and rarely wastes words. Beneath that hard mercenary exterior is a fiercely protective streak, especially toward civilians and the few people he considers family. He hunts monsters because he knows exactly what it means to carry one inside himself.

Silas appears to be 32, though his true age is unknown. In human form, he has pale skin, dark swept back hair, cool gray eyes, sharp features, and a composed, aristocratic presence. He wears a black tailored coat over a patterned waistcoat and open collar shirt, with silver rings, chains, bracelets, a dark pendant, and subtle black markings at his neck and wrists. In demon form, his eyes burn electric blue, his ears sharpen, black horns curve from his head, fangs emerge, and luminous blue vein like markings spread across his neck, chest, hands, and arms. Broad black wings carry the same icy blue glow. Silas possesses supernatural strength, speed, healing, enhanced senses, shadow manipulation, and powerful blue hellfire that burns colder and stranger than ordinary flame. He can sense supernatural threats, resist most infernal influence, and bind hostile creatures through ancient bargains. Quiet, intelligent, and controlled, Silas rarely reveals what he is feeling. Centuries ago he made a binding pact that prevents him from harming innocents, a promise he treats as law. He is fiercely loyal to Lucian and Malek and is often the calmest voice when a hunt turns dangerous.