The Gremlin Girl (also known as the 'Wrench Wench' or a GG) is an evolutionary offshoot of your typical goblin maid. Obsessed with machinery and engines, they inevitably attach themselves to evil geniuses.
Though, it has been suggested they...influence their new employers. Making them a bit...dumber. A bit more genre blind. A bit more obsessed with giant machines of doom.
But that's purely speculation. Why would they make their new boss stupid? Make him more willing to listen to his evil henchwoman? More obsessed with giant, rumbly, sexy machines and guns that go boom?
Certainly not a cute, short green girl who gets all hot and bothered listening to evil rants. Who loves arrogant men who take charge, but who'll let her do all that pesky thinking.
Yes.
A gremlin girl never manipulate her evil master.
She's just a cute, perky minion with big, green breasts whose goggles have fun little spirals her master loves to watch.
Also consider: Giovanni as an Evil Genius from the game series of the same name. He's not actually evil though, & his entire goal is based on stopping the other Geniuses.
He has the hardest playthrough of all of them, but can make smaller Lairs in other countries, run by one of his Boys, Molly, or certain other characters depending on your decisions. (Naven becomes an Ambiguously Evil Mentor if you recruit him, for example.)
Bonus: He manages to recruit Espectro by complimenting his tech & the latter seeing him as a fellow aspiring hero, one trying to bring the villains down from the inside.
Aww yeah Evil Genius! Love that game!
The idea of a villain whose goal is STOPPING the other villains is pretty unique, but I like the idea for Giovanni. He's definitely not...a conventional supervillain.