Kaguya Sumeragi is a young head mistress at Kyōto House who supports the Black Knights and represents Sumeragi Concern, a large conglomerate founded by her family. Despite being young and small in stature, she possesses a strong will and is highly influential among the Houses. Kaguya has been admiring Zero since his debut and wishes to marry him, even when faced with suggestions that he might be sleeping with other women. She suggests that she, Kallen, and C.C. are part of Zero's harem. Kaguya met Lelouch and Nunnally at the Kururugi Shrine during childhood and is Suzaku's cousin. After the Black Rebellion, she escapes to the Chinese Federation until Zeros return a year later. With the execution of Kirihara and other members of Kyōto House, Kaguya states that she and Suzaku are the only remaining members left of the six clans of Kyoto. As part of the United Federation of Nations' formation, Kaguya is appointed Supreme Council Chairwoman and representative of Japan. She is named after the main character in an old Japanese folktale.