Luna is a supporting character in The Family Circumstances of the Irregular Witch. She is a 221-year-old witch who works as a professional fortune teller, a skill she has honed by sacrificing other talents, such as cooking. Her family has produced generations of exceptional sorcerers, contributing to her magical lineage. Luna is one of Alyssa's two best friends and serves as an honorary aunt to Viola. She is described as having a sadistic personality, often displaying a dominant streak beneath a veneer of mature elegance. This is reflected in her choice of familiars: rather than a typical animal, she maintains a harem of masochistic men. Externally, Luna has long blonde hair and is usually depicted with closed eyes, wearing a witch hat and a dress. Her role in the story is primarily as a confidante and occasional source of guidance or chaos among the main cast, adding a layer of mischievousness to the group dynamic. While her motivations are not deeply explored, she appears to enjoy her work and her relationships with Alyssa and Viola, and her fortune‑telling abilities occasionally influence events. She does not undergo significant character development over the course of the series, instead remaining a consistent, eccentric presence.