Fujiwara no Hizuki

She's quite fond of Eirin.

Daughter of Kaguya and Mokou. Because of a princess mother (Kaguya) and a father soft to kids (Mokou), growing up being pampered a lot.

Her parents break up into a fight often (although not so frequent after birth of Hizuki), so she's kind of making a mistaking that "fight=love".