From InuYasha, the pairing of the two characters Sesshoumaru (Inuyasha's older, full-demon, half-brother) and Rin (the human girl resurrected by Sesshoumaru after she was eaten by wolves). The pairing is the second largest Sesshoumaru x Someone pairing (SessKag being the majority). Most fans of SessRin prefer Rin being older (at least 13).
Sesshoumaru and Rin are said to represent a balance (yin yang), and after Manga Arc 467-471, thought of as "cannon" by many SessRin fans.
by A Tribute To The Masses November 18, 2006