Yuuki Kaburagi (鏑木・優輝, Kaburagi Yūki, lit. "Arrowhead Tree, Tender Radiance") is a mysterious Shinigami that has allied himself with Gai Nagareboshi and is one of his most trusted and loyal friends. Unknown to Gai, Yuuki is head-over-heels in love with him, though he attempts to keep this a closely guarded secret. Yuuki is kind and considerate; however he has a darker side, which usually appears when Gai is threatened in any way or if others manage to catch his attention. He possesses two personalities, one being a sweet, devoted friend, and the other a psychotic, obsessive and jealous stalker.