Rin Baio (灰ばい尾お 凛りん, Baio Rin?), is a character in The 100 Girlfriends Who Really, Really, Really, Really, Really Love You. She is Rentarou's 22nd girlfriend, a third-year student at Ohananomitsu High School, and a violinist. Rin's parents are concert violinists, and she has been practising the instrument for a long time. As a child, Rin accidentally saw a violent scene from Resident Evil on television, and came to derive pleasure from any sort of depiction of violence. Rin tends to giggle and exclaim "violen-suwa" when witnessing or participating in violent acts, revealing them with a large grin.