Haruko Nakamori, known as "Grand Mère" in certain localizations, is the maternal grandmother of protagonist Mai Kazuki and matriarch of the Nakamori family. She co-leads the magic performance troupe Magic Carat with her husband Yousuke Nakamori. Haruko actively manages the troupe's operations and performances, extending her leadership to creative decisions like expanding their television presence after a producer noticed their show. She initially misunderstood plans for Emi's solo singing debut, believing the entire troupe would participate, reflecting her inclusive vision for Magic Carat. The troupe's relocation at the series' start inadvertently triggered supernatural events when Mai discovered the heart-shaped mirror containing the fairy Topo while helping move. Haruko's relationship with her daughter Yoko Kazuki (Mai's mother) includes a professional history, as Yoko previously debuted as a performer under Magic Carat's direction. Her supportive presence contributes to the familial environment shaping Mai's magic aspirations. Her characterization remains consistent across the main 38-episode series and associated OVAs, maintaining her role as a stabilizing force within both the family and the troupe.