Doctor Momochi is a human surgeon living in a small town, and the adoptive mother of Ikuma Momochi.
Dr. Momochi is a plain-looking woman with short dark hair.
Dr. Momochi is a kind woman, with great compassion for others whether they are human or Ghoul. She loves her son, and seems to struggle with letting him go.
Doctor Momochi established herself as a very successful surgeon in a small town, and was married to another doctor. After seven years of marriage, the couple was finally able to conceive a child with fertility treatment and looked forward to becoming parents. However, in her sixth month of pregnancy, her husband died suddenly from overwork.
Deeply traumatized by this tragedy, she struggled to live on for the sake of her son. But just prior to her son's first birthday, he died suddenly in his crib. The discovery of her son's body was too much for her to bear, and she wandered away from her house during a major rainstorm while carrying her son's body.
While wandering in a daze and contemplating suicide, she stumbled across an injured woman hiding beside a building. As she approached the other woman, she realized it was a Ghoul that was being hunted by Ghoul Investigators. The Ghoul was badly injured, but cradling a newborn that she had managed to protect from harm. She pleaded with Doctor Momochi to save her son, and the two women exchanged their sons before the Investigators could catch up.
She took the newborn Ghoul home with her, and passed him off as her dead son. From the news the following day, she learned the Ghoul she'd encountered had thrown herself into the ocean. After she returned to work, Dr. Momochi used her position to obtain food for Ikuma and falsified documents so that others would believe he had a severe food allergy. For the next 19 years, she raised Ikuma as her human son until he came of age and decided to move to Tokyo. Though worried for his safety, she saw him off from the train station and kept in contact with him after his move to the city.
Though not his biological mother, she raised the orphaned Ghoul as her own son. She loves him dearly, and has worked tirelessly to protect his identity from society.