Ruri Miyamoto

She is Kosaki's friend. She supports Kosaki's love for Raku, often giving her a push from behind to take the next step forward. Also beats up Shu for his perverted comments.
She fell in love with Shu later on in the series and eventually confessed to him. She also said that she will wait for Shu to get over his feelings for Kyoko. In the final chapter it is shown that she is now working as a translator and living with Shu.