An RPG character I once had. He's a socially inept nerd that wants to be the best and prove to his shady family that being a hero is the right path. He can cast illusions in your mind, making you see what he wants you to see, and a family heirloom amulet that he wears as a pocket watch and grants him invisibility.
Here he is being unknowingly creepy. Watching and taking nerd notes on his fellow classmates about their strengths, weaknesses, powers, relationships, etc.