Haru Kirishima

She lost her parents when she was two and grew up in the Hidamari Garden Children's Nursing Home, along with Ryousuke. She and Akane became friends in high school.

She is Bossun and Tsubaki's biological mother. When Haru was about to go into labor, Akane drove her to the hospital - only for them to be hit by another car on the way. She died after giving birth to the twins.