Riku Harukaze is the paternal grandmother of Doremi and Pop Harukaze. She resides in Fukuyama, which Doremi and her friends visit during the events of the film *Mo~tto! Ojamajo Doremi: Kaeru Ishi no Himitsu*. Riku is characterized by her kindness and gentleness. She is frequently shown engaged in traditional domestic routines, with cooking being an activity particularly associated with her. The documented media does not explore an additional background story, character development, or expanded role for Riku across other seasons, films, OVAs, or spin-offs.