Loona is a cynical and choleric young-adult Hellhound, who was adopted from an orphanage by Blitzo when she was nearing eighteen years of age. 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. Although, Loona goes to great lengths to maintain an outwardly apathetic attitude, her troubled and isolated upbringing appears to have made her socially awkward.