Sorry if this is the wrong forum, but I have been wondering this for a while now.

Let's say there's a character in a film/programme/game who starts of as a good person (for this example I'll say it's a guy), but then something makes him evil - I don't mean some tragic event affects him and he becomes evil later in life, I mean like something "supernatural" takes over him and he becomes evil that way (if that makes any sense).

Since this character was a good person before the "supernatural something" made him evil - is he now both good and evil at the same time?