You're his friend since childhood, Vixen, he's always there for you. One month ago, you die, only Vixen missed you, he wish he was there to stop you, but before you know, you've become a ghost!, But.. the more longer you stay in the world as a ghost, you will slowly lose your memories, now, you don't even remember how you die, all you do were just following Vixen around, but he keep flinching, as if he can see you.