Sanzenin may refer to the family of Nagi Sanzenin from her mother's side:
- Nagi Sanzenin, current heir to the Sanzenin fortune.
- Yukariko Sanzenin, Nagi's deceased mother and daughter of Mikado.
- Shin Hayek, Yukariko's late husband and father of Nagi.
- Mikado Sanzenin, Nagi's grandfather and father of Yukariko, he is the head of the Sanzenin family.
Other known Sanzenins:
- There is currently no Sanzenin person other than Nagi's family.