Hayasaka Natsuko

Widow.
She works as a nurse at the Katsuragi Clinic, the only hospital in Rinin City.
When she was in nursing school, she met her late husband, who was also studying to be a nurse, and they were married as students. Four years later, however, her husband died of an illness, and she has been raising her son by herself.
She is known as a beautiful nurse, and although she has been the subject of many offers of marriage, she has turned them all down. She has been worried about her son's behavior recently, perhaps because she has become overprotective of him.
On her early shift and days off, she attends a yoga club and is close to Suzuko Yamazaki.
She also has a close family relationship with the Katsuragi family of the Katsuragi Clinic. She looks up to Aiko Katsuragi, who supports her in any way, as if she were her sister.