Kisara Sumeragi

Having forgotten the strange girl who lived in the mountains, Kisara grows up with the police force, knowing that he is immortal and remembering only that a lycanthrope cursed him with it. Over the years, he developed a hatred for the girl who changed his body. When Chiruha appears out of the blue, Kisara seems determined to gain her trust and then kill her, as revenge for the "curse". After attempting to kill her while she slept, his memories return and he realizes that she saved his life, and that she didn't even know what she had done. After this, Kisara slowly starts falling in love with her, while it seems that Chiruha only considers "Ki-chan" as a friend. (Source: Wikipedia)