Miku Sanjyou, a married woman balancing her own home with an apprenticeship in traditional Japanese dance at Aoi Ouhara's mansion, possesses striking blue eyes and long blue hair. She stands 172 cm tall with measurements of 95-58-93 cm. Her personality is energetic, outgoing, and talkative; she reacts passionately and speaks without restraint.

Her husband, Sanjou Seizou, is a suburban Shinto priest who tolerates her extended mansion stays and maintains friendly ties with Aoi's household. While Miku admires Aoi's grace and laziness, she feels troubled by behavior she perceives as leaning toward lesbianism rather than simple affection, influencing her interactions there.

Miku shares a childhood history with the mansion's housekeeper, Kenta, where she dominated him as a tyrant. Their adult reunion reverts to this pattern. She openly comments on household matters and engages in heated exchanges with Kenta. Over time, she begins accepting his requests for sexual encounters, altering their dynamic.

Her motivations include preventing Kenta from pursuing Aoi, towards whom Miku harbors unacknowledged feelings. She offers herself sexually to deter him, aiming to exhaust his interest. This strategy evolves as she develops her own appreciation for physical intimacy. Despite this, she later shows reluctance to continue the relationship with Kenta, creating tension about future choices.

Miku's varied wardrobe includes miniskirts, tank tops, tube tops, micro bikinis, and a wedding ring, reflecting her married status and casual style. Her central identity as a dancer and apprentice persists, while her personal conflicts and evolving relationships drive her development.