Loly Aivirrne is the thirty-third arrancar in Sōsuke Aizen's army, who, together with Menoly Mallia, performed the duties of his assistant. Despite her youthful appearance, she is distinguished by a hot-tempered and vengeful disposition, especially when it comes to Orihime Inoue.
Loly is hopelessly in love with Aizen and is jealous of him toward anyone who receives his attention. She is impulsive and not infrequently rushes into battle against opponents noticeably superior to her in strength, for which she has more than once been severely beaten.
At the same time, a sense of gratitude is not alien to her: when Orihime saves her life, Loly, continuing to hate her, nonetheless considers herself obliged to protect the girl. After the fall of Las Noches, she, together with Menoly, survives an attack by Yagdarumi and later joins the ranks of the Exequias.