Tsukasa Hiiragi is generally a sweet, naive, innocent and dimwitted person who never gets mad, similar to Miyuki. Her calm, girly, cheerful, and friendly personality heavily contrasts with that of her sister, Kagami, who is a Tsundere and takes on a much more harsh, tomboyish, and arrogant attitude. Tsukasa is often overshadowed and compared with her older twin sister, Kagami, because she does not seem to excel at anything, including studying and sports.