: July 7th : 157 cm (5'2''): Washimiya, Saitama Prefecture : B : Cancer: Left-handed: Home economics : PE: Light Purple: Purple-Blue: Strawberry Shortcakes, Sleep and Mobile Phones: Comiket, Waking Up, Horror films and Work

Tsukasa is the younger fraternal twin sister of Kagami and lives in a six-member family household with her parents. She is in the same class as Konata though isn't good at studying or at sports, but excels in cooking.

Tsukasa's physique is a little smaller than average. She has short, light-purple hair, and wears a ribbon like a head band in it, and her droopy eyes are light violet. She is portrayed as a stereotypical klutz and as a "healing-type" character. She spends a lot of time sleeping.