Because you like Stede Bonnet in Our Flag Means Death
Wei Shen is an undercover cop on a mission for justice (or at least vengeance). See them in Sleeping Dogs.
Despite the dissolution of his state, Prussia hangs on – mooching off his younger brother Germany and reading comics. See them in Axis Powers Hetalia.
Reckless, vulgar, loud-mouthed: that's what makes Amethyst so awesome. See them in Steven Universe.
Basil Hallward is dominated, soul, brain, and power by Dorian. See them in Dorian Gray.
Mavis Dracula's interests are anything black, scream cheese, and flying around. See them in Hotel Transylvania.
John Wick is a widowed former Navy Seal who becomes a notoriously effective hitman, killing over 124 people with gunshots alone. See them in John Wick.
A Silurian lizard woman, Madame Vastra has a penchant for puzzles and interspecies romance. See them in Doctor Who.
M. Bison is a diabolical megalomaniac hell-bent on dominating the world. See them in Street Fighter.
Cyclops shoots lasers out of his eyes, destroying anything in his line of sight. See them in X-Men Series.
There is never a dull moment with Jim Moriarty: expect booze and sing alongs in between all of the homicide. See them in Sherlock.
Nadia Vulvokov is a no-nonsense broad with a dark sense of humor and a flippant attitude. See them in Russian Doll.