Tsubasa Tanuma is the doctor's grandson. He is worried that Tsubasa might continue the family tradition of jumping into family at 17 years old.
As he is the Shinomiya's family doctor, Kaguya Shinomiya falls into his priority list patient. He got worried when Kaguya got admitted to the hospital and take it in stride when he realised Kaguya is just lovestruck. The doctor even supported her relationship with Miyuki Shirogane.
She is the nurse that accompanies him. She is very blunt with him and talk with him casually.