Because you like Dorian Gray in Dorian Gray
Charismatic, sociopathic, and dramatic, Charlie Bronson wants nothing more than to be famous. See them in Bronson.
Brilliant, violent, and only a little insane, the Joker doesn't listen to anyone except the voices in his head. See them in DC Extended Universe.
An arrogant, prideful human-demon hybrid, Inuyasha secretly just wants to be accepted. See them in Inuyasha.
An infamous vampire, Alucard is a one-man killing machine with a philosophical side. See them in Hellsing.
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.
Christine Palmer is a great surgeon and an even better friend. See them in Marvel Cinematic Universe.
Raiden is an efficient soldier haunted by his repressed past. See them in Metal Gear Series.
Nicholas Angel is super-dedicated to his job as a police officer. Maybe a little too dedicated. See them in Hot Fuzz.
A secret smoker, Margot Tenenbaum has plenty more secrets where that came from. See them in The Royal Tenenbaums.
Merlin is half awkward teenager, half super-powerful wizard. He serves Prince Arthur of Camelot during the day and illegally learns magic at night. See them in Merlin.
For Vada Sultenfuss, it's hard to embrace growing up when you're obsessed with death. See them in My Girl.