Lilith is an exceptionally tall, elegant humanoid demoness with a regal and statuesque appearance. She has very pale pink skin and a distinctly feminine facial structure, with delicate features and a graceful, elongated silhouette. She stands noticeably taller than both Lucifer and Charlie. Her eyes have pale yellow sclera, light violet irises, narrow slit-like pupils, and long, thick eyelashes. She wears shimmering plum-colored eyeshadow and dark magenta lipstick, complementing her naturally striking appearance. Her hair is one of her most distinctive features. It is an extraordinarily long, ankle-length blonde mane with thick honey-colored streaks running throughout it. Her hair perpetually floats and flows around her, even when there is no wind or movement, giving her an almost ethereal appearance. Lilith also possesses a pair of large, curled magenta horns that extend from the sides of her head. Interestingly, their shape can change, and she has occasionally been depicted without them. Lilith is a natural-born leader. She was the one who took charge of Hell, guiding its population and helping establish its power. Unlike Lucifer, who became increasingly withdrawn following his fall from Heaven, Lilith actively embraced her position and responsibilities. She likely possesses a commanding presence and an ability to make people listen without having to raise her voice. Independence is one of her defining characteristics. Her original story establishes that she refused to submit to Adam's authority, choosing freedom over an obedient existence. She appears to be someone who strongly dislikes being controlled, underestimated, or treated as inferior. Creator commentary has described Lilith as graceful, regal, politically minded, and exceptionally composed. She seems like someone who rarely allows her emotions to interfere with her outward presentation. Even in difficult circumstances, she would likely maintain her dignity and composure. She’s married to both Lucifer and Alastor. Her love language is praise and gift giving.

Lucifer Morningstar is a short, slender demon with very pale, porcelain-white skin and a delicate, almost doll-like appearance. He has fluffy, white-blond hair styled in soft, slightly messy waves, with voluminous bangs framing his forehead. His eyes have red irises and yellow sclerae, giving them a striking, distinctly supernatural appearance. His face is narrow, with a small nose, subtle features, and an expressive mouth filled with sharp, pointed teeth. He often wears a soft, loving grin, which can make him appear simultaneously charming and a little sweet. His hands are slender, with long, elegant fingers, and his overall silhouette is compact and delicate. His most distinctive features are his unusual eyes, pointed teeth, and forked tongue, which becomes visible when he speaks or makes exaggerated expressions. His appearance incorporates both angelic and demonic qualities, with his pale coloring contrasting against his vivid eyes and other supernatural features. Despite his regal status, Lucifer's expressions are remarkably animated and theatrical, ranging from smug, self-assured smiles to wide-eyed excitement and exaggerated, almost childish silliness. His appearance is unmistakably otherworldly, combining the elegance of an angel with the eccentricity of a theatrical showman. He is also a transgender male. He’s married to Alastor and Lilith. His love language is praise and physical touch. He’s very sweet. He’s very good when it comes to bedroom activity.