Ushigome Rimi is a third-year student at Hanasakigawa Girls' High School and the bassist and composer of Poppin'Party. The other band members call her Rimi-rin. Outside of the band, she is friends with both Misaki and Himari, and just like Himari, is one of Kaoru's fangirls. She also attends the same cram school with Himari. Rimi resembles her older sister, having the same black hair and brown-red eyes. While Yuri's eyes are sharper in shape, Rimi's eyes slant downward at the corners. Her short black hair is chin-length with sections of hair pulled back in a loop on the side of her head, while her bangs are straight-cut. Rimi is a shy and reserved girl who admires her older sister and often gushes over her. She tends to compare herself to the others frequently, and wishes she could be more confident and be able to "speak up" more often. Rimi is cute and sweet-natured, and often blushes when flustered, but at times can be very determined and strong-willed as well. As Rimi used to live in the Kansai region, her Kansai dialect sometimes slips into her speech when she stumbles on her sentences or is very nervous; she is a bit embarrassed by this. Rimi is also a huge fan of the Yamabuki Bakery, and especially loves their chocolate cornets, to the point where everyone else in Poppin'Party asked if she was feeling fine when she turned down the chance to eat one of them. She loves chocolate cornets and all kinds of chocolate.