From what I can recall, the animé touched on the idea a little bit but more often than not it was just a demon pretending to be a human on its own power (I don't recall any time Dante concerned himself with the possibility of the human disguises formerly belonging to real humans) and in Devil May Cry 3 Arkham convinced Lady (for a short time) that Vergil (who Lady must have been under the impression was 100% demon) had 'possessed' him and made him do what he did.
Were there any other instances of the topic of possession throughout the series? If so, please remind me. If not, please share your opinions of how you believe it would be handled if DMC demons could possess humans.
Were there any other instances of the topic of possession throughout the series? If so, please remind me. If not, please share your opinions of how you believe it would be handled if DMC demons could possess humans.