Because you like The Master in Doctor Who
Guillermo is the best servant a vampire could ask for. For years now. Not that he's counting. See them in What We Do In The Shadows.
Don't ask the ruthless queen of the Tokyo underworld any questions unless you're fine with losing a limb. See them in Kill Bill vol. 1.
Roger Kint is a nervous, weak, ham-handed criminal. We think. See them in The Usual Suspects.
Andy Dwyer might not be completely literate, but he makes up for it in spirit. See them in Parks and Recreation.
Mike Ehrmantraut is rutheless, merciless, and probably the most endearing hitman you've ever met. See them in Breaking Bad.
Kenny McCormick is a boy of few words who likes nudie mags, NASCAR, monster trucks, origami, and Peruvian pan flute bands. See them in South Park.
Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.
Frederick Frankenstein is an eccentric (O.K., maybe a little insane) professor who is excited to be delving into his family's past. See them in Young Frankenstein.
V is a violent anarchist with literally nothing left to lose. But, he might have a point. See them in V for Vendetta.
Roger is a pansexual alcoholic non-human who will happily lie, cheat and steal to get what he wants. See them in American Dad!.
Because of Miles Edgeworth, the truth will always make itself known. See them in Ace Attorney Series .