A servant in the Sohma household, Rina hates Akito and works with Shima to erase Noa's memories so that Akito will suffer.  However, once she realizes how much pain it causes Akito, she regrets her actions.  She apologizes to Akito and is stunned when Akito calmly offers to help her find work elsewhere if she really wants to leave, but Rina decides to stay even though she knows she will be punished for what she did.

Later, Rina helps Yuta get a drunken Akito to bed and teases him when Akito unknowingly makes rather lewd suggestions.

Voice: youthful, manipulative at first, apologetic later on