Ui Hirasawa is presented with an endearing, gentle expression that reflects her kind demeanor in K-ON!. The figure captures her long, flowing hair with subtle movement and her school uniform featuring a crisp blazer and pleated skirt. She stands beside a compact keyboard, each key sculpted with careful detail, ready to perform. The base mimics a classroom floor, with small music notes floating around to hint at her musical role. The paintwork emphasizes soft tones and delicate shading to convey her youthful charm.

Ui Hirasawa is Yui's cheerful younger sister who joins the light music club, bringing warmth and quiet determination. In the series, she studies hard, helps organize practice, and provides a calm counterpoint to the others' ebullience. She develops a love for music, borrowing the keyboard to train at home, and gradually gains confidence on stage when the band performs. Her gentle presence strengthens the group's bonds, and her sunny gratitude often lightens tense moments. This figure honors her role as a kind, diligent friend who supports her sister's passion and the club's camaraderie.