Asagi Ayase is a supporting character in the manga series 'Yotsuba&!' (Yotsuba to!). She is the eldest daughter of the Ayase family and the older sister of Fuuka and Ena. Asagi is portrayed as a witty, easygoing, and somewhat mischievous high school student with a mature yet playful demeanor. She often teases her younger sisters and Yotsuba, but she is also caring and responsible. Asagi plays a crucial role in the series by providing comic relief and acting as a reliable older figure for Yotsuba and her friends.