User blog comment:12th Supernova/Chapter 773: TwoFace got nothing on this/@comment-1595565-20150115164119/@comment-4493594-20150115191607

I'd love to have a backstory for that guy. Is he just a rejected part of Cavendish's personality or did he use to be a different person entirely and his ghost just possesses Cavendish's body? If so, why?