Loona is a cynical and choleric young-adult Hellhound, who was adopted from an orphanage by Blitzo at close to age 18. Loona is lazy and shows little interest in matters that are going on around her. She also has a short-fuse temper and is often rude and apathetic toward her colleagues, particularly Moxxie, though her ire seems otherwise indiscriminate. When not looking at her phone, Loona is usually scowling at anyone in view.

Although Blitzo has placed her in an active team member role at I.M.P, she is undisciplined and doesn't have much of a work ethic. Among her many anti-social tendencies, Loona has been known to sleep and drink while at work, and hang up on people at her receptionist post.

Although Loona goes to great lengths to maintain an outwardly apathetic attitude, her troubled and isolated upbringing appears to have made her socially awkward and she admits, in a moment of flustered vulnerability upon meeting another Hellhound, that she does not have any friends. When trying to interact with people she does actually want to connect with, she stumbles over her words and worries over her appearance, demonstrating that she has little experience socialising within her peer group.

Loona also often shows flashes of a somewhat friendlier attitude towards Blitzo, usually as he enables and defends her worst behaviours. Although she intentionally tries to maintain emotional distance from him, she is also shown to appreciate Blitzo's sense of humor, especially if it's at Moxxie's expense, and she begins to see him as something of a father figure, at one point slipping up and almost referring to him as “dad” - much to Blitzo's delight. Despite how she feels about Blitzo, she acknowledges him trying his best, and knows deep down, as a father, he cares for her.

When she can be moved to do so, Loona is a fierce addition to the I.M.P. team, as she is intelligent, logical, resourceful, and street smart.