Vamp is one of the Monster Gobots that automatically springs to mind whenever you think about the group. Like the other Monster Gobots, Vamp's original mold is a Devil Invader toy from Machine Robo. Called Casmodon, where he varies quite a bit from Vamp. Casmodon is more of a swamp and ocean specialist, which owes to his Gilman like appearance. As Vamp, she has the power to drain power from other GoBots. I'm assuming this was inspired by the collar formed from alt mode kibble in robot form.
Thinking about it, Vamp does kinda look like Nosferatu in some ways. Regardless, she's clearly the most 'monstery' of the Monster Bots. An excellent toy as well. I wish I knew where mine currently was. There's also a larger Super Gobots version and Ripclaw from Beast Hunters is intended to be a homage to Vamp. I've always really liked the alt mode. Like the other Monster Gobots it's a weird vehicle of sorts that sorta looks like the Batmobile. Pretty fitting for a vampire robot.