Loona is a hellhound with a wolf-like appearance. She has a pointed, doglike muzzle with sharp and pointy teeth, and a dark grey nose. Her eyes have red sclera with white irises, and she wears grey eye shadow and black winged eyeliner for makeup.

Her outfit features a large, spiked black choker around her neck. Her tattered grey, off-the-shoulder crop-top is held up at the neckline by a series of crisscross spaghetti-straps that form an inverted pentagram.