Because you like Chuck Bass in Gossip Girl
Sebastien Michaelis is a demonic butler who approaches life with effortless finesse and a diabolical streak. See them in Black Butler.
After becoming accepted into the group of popular girls, Tracy Freeland has turned from a sweet and reserved teenager into a monster. See them in thirteen.
Yukiteru is a reclusive observer who would rather watch life go by than participate in it. See them in The Future Diary.
His name is Inigo Montoya and whoever killed his father should be prepared to die. See them in The Princess Bride.
Eliot Waugh is the unspoken leader of his group of friends at a school for magic. See them in The Magicians.
Butters Stotch is a kind-hearted student who likes ladybugs, Charlie's Angels, art class, baby-back ribs, and Little Bunny Foo Foo. See them in South Park.
A meticulous forensic scientist, Edward Nygma is insanely good at his job. Emphasis on the "insane" part. See them in Gotham.
Funny, self-destructive, and in her own head, Fleabag has spent most of her adult life using sex to deflect from the screaming void inside her empty heart. See them in Fleabag.
Trying to get through school without being a burden to anyone, Tohru Honda stays cheerful despite her difficulties. See them in Fruits Basket.
Shuri is a genius-level inventor with a wicked sense of humor. See them in Marvel Cinematic Universe.
How lucky are we that Arthur Curry, the King of Atlantis, hasn't taken over the surface world? Very! See them in DC Extended Universe.