[quote=@Lmpkio]
Now seeing the Lunar Wolf Guild master... WHY did Kuroku join him again?! (Jk)
[/quote]

Um... Cause the plot calls for it?
Maybe he felt he could change things or something... Help people stay alive when possible from the inside? 
Maybe he's a double agent for the Harpies? Or the Vypers? Idk... XD