Because you like The Man in Black in The Princess Bride
The vampire that killed Zero Kiryu's family also infected him, and he starts to crave blood, much to his horror. See them in Vampire Knight.
Big Boss is a disillusioned mercenary commander who wants to create a world for soldiers (and soldiers alone). See them in Metal Gear Series.
Sabrina Spellman is half-witch-half-human, a headstrong and loyal cheerleader with an affinity for spell-making. See them in Chilling Adventures of Sabrina.
Christopher Turk is bringing his A-game to his next big challenge: becoming a surgeon. See them in Scrubs.
Korra is stubborn, outgoing, and faced with huge responsibilities she might not be ready for. See them in The Legend of Korra.
Ariel knows there's a whole other world above the sea, but exploring it comes at a big price. See them in The Little Mermaid.
Greenpeace? No, this brave eco-terrorist is waging Greenwar. See them in Final Fantasy Series.
Marv is a brutish but principled thug who'd be right at home on an ancient battlefield. See them in Sin City.
Those who stand against this singular super ninja are doomed to fail. See them in Ninja Gaiden.
Tony Montana makes up for his language barrier with his immense skill at cursing as loud and effectively as humanly possible. See them in Scarface.
Kendall Roy is a wanna be ruthless businessman who comes across more like an anxious teenager. See them in Succession.