shadowgast + dorian
Interesting is indeed a word for it.
Spirits are a bit different in our world. I was actually friends with one for quite some time. Cole was a spirit of compassion who had become almost human after being separated from the Fade. I know that spirits can be good. I just don't know that Justice still possesses that capability.
Back home, he blew up the Chantry and killed a number of people in the name of "justice". He doesn't seem to feel any remorse for his actions because they were just in his mind. I don't think he even sees how much his passenger has affected him or how he has affected it. His actions are far more vengeance than justice.