Yuzuru

ユズル

A 13-year-old boy (though he appears considerably younger) who was Nanami's next-door neighbor. Since both families were frequently away, they spent time together, leading Yuzuru to view her as an older sister figure. After Nanami becomes a vampire, he searches for her even at the risk of his own safety, and later assists Mina and Akira in saving Nanami. It is revealed that he loves Nanami as deeply as she loves him, and allows himself to be turned into a vampire by Nanami so they can live together in the Bund. After being forced to attack Nanami, his lover, Yuzuru turns his back on Princess Mina and joins Rozenmann. When it is later revealed that Nanami is, in fact, still very much alive, he appears to abandon Rozenmann's service, and the two, Yuzuru and Nanami, are last seen (as of Volume 13) presumably fleeing Rozenmann's castle via underground passages.