Tachibana is Haines blood related little brother. Upon seeing Haine he mistakes her as their mother because they are alike in appearance. He is rude to her until he finds out Haine is his older sister. Later he is very kind to Haine and has that quotlittle boyquot nature around her. Kusame was jealous of him because he spent much time and clung on to Haine. He is the soon to be quotheadquot of the Kamiya family as the only male heir.