Anzu Kiriyama

Anzu Kiriyama is Yui's younger sister. She is a 2nd year middle schooler. Anzu has a similar appearance to her older sister and the two have matching green eyes, though her light-brown hair is trimmed to chin-length. Despite being two years younger, Anzu is noticeably taller than her sister. Anzu is shown to be a caring sister towards Yui, often checking up on her, though it is implied she is unaware of her sister's androphobia. Anzu admires Yui for her karate skills and was disappointed when her sister quit martial arts. When Yui eventually returns to karate, Anzu helps her train.