She had three sons, Shoichiro, Sojiro, and one unnamed with her husband. Her husband was the tea master of the Nishikado family, until his son took over. She appeared to be aware of her husband's infidelity.
Tsukushi Makino described Mrs. Nishikado as "very beautiful, but she seems a little cold". Her dark hair was always put up and she was never seen not wearing a kimono.
Sojiro's mother is briefly mentioned in Hana Yori Dango Returns (2007). Similar to the manga, her elder son leaves the family due to pressure. He also cuts off contact with them.
In Meteor Garden (2018), Xi Men (Sojiro) describes his parents marriage as a "lie". Despite being unhappy in her marriage, she wishes to keep up appearances. It is hinted that her husband cheats on her since he does not come home some nights. Xi Men often catches his mother crying.
Xi Men's (Sojiro) mother is played by an unknown actress in episode two of Meteor Rain (2001). She asks her son to stand in his father's place at a party. Xi Men guesses that his father is probably with his mistress.