Asa Shigure is a main character in the anime series 'Shuffle!'. She is a lively and energetic high school student known for her bright personality and friendly demeanor. Asa is the daughter of Ama Shigure and is part of the human world in the series. Despite her cheerful outlook, she struggles with a hidden illness, which becomes a significant plot point. As a close friend and love interest of the protagonist, Rin Tsuchimi, Asa plays a central role in the dynamics and emotional depth of the story, balancing humor and drama.