Yuina exhibits a lively personality and regularly participates in costume contests. She possesses bright orange hair with darker shading in certain sections, thin eyebrows, and dark turquoise eyes. Two medium-sized cream-colored bows are consistently tied on either side of her head. Her typical attire features criss-crossed pink and white themes. When prompted to reveal her underwear, Yuina expresses surprise, remarking that the requester has already seen her costume show panties repeatedly. She blushes upon realizing an implied preference for her personal underwear over performance attire. Yuina complies with the request, using a chair to support her right leg during the reveal. Afterward, she removes the underwear completely and instructs the viewer to permanently remember the moment.