Loona is the receptionist of I.M.P, the adoptive daughter of Blitzo and one of the main protagonists of Helluva Boss.
Loona is a wolf-like Hellhound. She has a dog-like muzzle with sharp and pointy teeth and a dark grey nose, red sclera with white irises, white fur with grey patches on her shoulders, a big bushy tail and voluminous grey hair swept to the side to reveal her ear. She is far taller than her co-workers making her easily the tallest of the main Helluva Boss cast.
Her outfit features a black choker that has white spikes. Her grey crop top has strings shaped like a star to resemble an inverted pentagram to hold it up. Loona wears fingerless gloves and shorts with a crescent moon on the right side. She also wears black toeless stockings and is barefoot, due to her digitigrade stance. She has a piercing on her right eyebrow and two piercings in her left ear - in addition, her right ear is torn.