Yui Hirasawa

Yui is a teenager of average height (1.58 m), with brown eyes and thick, shoulder-length brown hair that is often adorned with two yellow hair clips. Yui is relatively fashion-conscious and prefers styles featured in teen magazines. She wears skirts over trousers. She also wears casual clothes at home, such as shorts, jeans, and T-shirts.

Like all students at Sakuragaoka High School, Yui wears a school uniform. The Sakuragaoka uniform consists of a dark blue blazer, a plain white button-down shirt, a colored sash (different sash colors correspond to different grade levels; Yui's grade level is light blue), a light blue skirt, stockings or socks (Yui wears black tights), and maroon shoes. The summer uniform requires a beige vest instead of a blazer. Additionally, physical education classes require a tracksuit (a track jacket with long pants, the color of which again depends on the grade level) with white stripes, a white shirt with colored trims (again, with the color identifying the grade level) for the summer semester, and white athletic shoes.

Yui is a cheerful, carefree, and lazy girl who loves to spend her time doing nothing. This takes its toll on her: her younger sister does all the housework, and at school, Yui is often the only one who has to retake tests. But if a hobby catches her eye, she'll throw herself into it and master the material in record time—albeit at the expense of other activities, as she's just like that: as soon as she learns something new, she immediately forgets everything else. Another interesting aspect is how Yui learns new things. She completely rejects boring theory and textbooks, preferring constant practice and her own intuition. While she doesn't know any musical terms, she plays the guitar very well. This is aided by her perfect pitch, as she can tune her guitar without any special equipment and easily repeat melodies. With her open and friendly personality, Yui easily wins over everyone around her. She's very tactile and often hugs her friends. At the club, she serves as a source of inspiration and a welcoming atmosphere. During breaks, which are HTT's main pastime, Yui happily devours the sweets and drinks tea generously brought by her friend Tsumugi, and, as she herself claims, eats as much as she wants—and doesn't gain weight. She has no stage fright, and in front of a crowd, Yui can calmly and somewhat naively talk at length about the most ordinary things: how the girls drink tea after class or how they goof off at the club.