Asuna's mother, Subaru's older sister./

Her background is revealed in the latter part of the story. The Shishime family has the duty to protect this town, by protecting the tree inside the town's shrine. Being the youngest of all sisters, she must remain in ward 13 forever to carry on with her duty./

Despite being with Asuna all the time, she has never seen Asuna's true feelings/. Upon hearing from Alice regarding Asuna's wish, Haruka decided to support her.