The Hiiragi Family is Kagami and Tsukasa's family. It is the largest family in the series.
Members of the Hiiragi Family
It consists of:
- Tadao Hiiragi - The father and only male in the family
- Miki Hiiragi - The mother
- Inori Hiiragi - The eldest sister of the family
- Matsuri Hiiragi - The middle sister
- Kagami Hiiragi - The older twin and second youngest in the family
- Tsukasa Hiiragi - The younger twin and youngest in the family
- Due to the anime's popularity, the Hiiragi family has been officially registered as residents of Washimiya.