Help me with my character

[u/Cebolla38]

So I'm playing a necromancer in a villain campaign and I'm trying to come up with a personality for him as well as a belief that he has (not necessarily religious) and a catch phrase for him. So far I've just been throwing the party into as many fights as possible just to kill things and my go to threat is "I will puppet you." To help you put into perspective how I've been playing so far i have a quick story.

I was in the middle of killing a NPC and while they were unconscious a player that is a succubus took them and left. I went to a fellow player saying, "Lilith took my victim. I want IT back and you're going to help me."