Tsukasa Hiiragi is a gentle and kind-hearted character from the anime series Lucky Star. She is the younger twin sister of Kagami Hiiragi. Tsukasa is known for her sweet and innocent personality, often appearing somewhat air-headed and clumsy compared to her more serious and studious sister. Despite her flaws, she is loved by her friends for her caring nature. In the series, she serves as one of the main characters, contributing to the comedic and light-hearted atmosphere with her endearing antics and close relationships with her friends.