Unnatrually strong even by Oni standards, Rin is a shit talking, powerhouse that believes her self to be the best. She's wary to trust others after a village of humans turned on her as a child and has since stayed loyal to the only one she trusts, her cousin Moka the blue oni. The two initially work as muscle for Kana in the hopes of getting revenge on the guildmaster of Haven, after he took away their easy meal ticket in Beth the Behemoth. Though over time Rin joins said guild and finds the camaraderie she has always wanted.