|Relatives||Akiho Sairenji (daughter)|
Haruna Sairenji (daughter)
Fuyuhiko Sairenji (husband)
|Manga Debut||Darkness Chapter 54|
|Anime Debut||Darkness 2nd OVA 3|
Natsumi Sairenji is the mother of Haruna Sairenji and Akiho Sairenji. She made her debut in Darkness Chapter 54, where her appearance and her name are revealed along with her husband for the first time.