shibiryu
the sidekick to beats everyone and leads the hero to his death for his own benefit
( Finally, something more than the straight up superhero or vigilante answer. That a jab at the current comic events ? )
The guy that shows up to offer you advice when you can't figure out what to do only to later reveal himself as the villianous mastermind behind all the events in his bid to take over the world etc. and that everything you've done has put him within the last step of his completion of his quest : Destroying you the hero/heroine.
