Tomizo's wife, stepmother of Koji and Ichiro. Kaoru's mother from his first marriage. An extremely beautiful woman with a quiet personality. She comes from a noble family that went bankrupt due to a series of failures. Sumie has a good relationship with her stepson Koji, but has little time for him. She is not in contact with her second stepson Ichiro, but is on friendly terms with his wife Mitsuko.
