Gaen is a family surname that normally refers to Izuko Gaen. It could also be used to refer to her other family members, such as:
- Suruga Gaen, her niece who now goes by the name of Suruga Kanbaru.
- Tooe Gaen, her deceased sister.
Gaen is a family surname that normally refers to Izuko Gaen. It could also be used to refer to her other family members, such as: