If you met Nightstrike, you might be impressed by how polite and mild-mannered he is. Of course, that's offset by his monstrous, bat-like visage. Less obvious than either of these things are his ability to use his sonic scream in order to stimulate the fear processing centers of his victims' brains, and his vampiric ability to drain them of their energon. He may tell you he's simply doing what he needs to survive, but Nightstrike will still readily drain the life out of whomever he ends up trapping in their own nightmares.