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yay Boyfriend is a young, light-skinned man with spiky cyan hair and a confident expression. He wears a magenta-white T-shirt with a red prohibition sign, baggy dark blue pants, pink-red sneakers with magenta-white shoelaces and soles as well as black dots on the quarters, and a backward pink-red cap with a dark blue brim. He holds a bluish gray microphone in his right hand while keeping his left hand in his pocket. He is drawn in a chibi style, giving the impression that he is very small and/or disproportionate. During Week 4, his hair gets blown around as a result of standing on a moving car. During Week 5, he wears a red parka with white fur, light blue pants and light brown snow boots, to suit the Christmas theme. During Week 6 and as the opponent of the unused song Test, his regular appearance is brightened and rendered in pixel art style. He also moves his mic differently. During the last track of Week 7, he holds Girlfriend up by the waist with his left hand.