Because you like Nyota Uhura in Star Trek
Gollum is slimy and seething with hatred, the last person you would want to meet in a dark cave. See them in The Lord of the Rings.
Daenerys Targaryen will take what is hers with fire and blood. Thankfully, she has some dragons by her side. See them in Game of Thrones.
Eponine is a scrappy street urchin with a bad case of unrequited love. See them in Les Miserables.
Amy Santiago likes following the rules a little too much. See them in Brooklyn Nine-Nine.
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.
Father to a murdered son and husband to a murdered wife, Maximus Decimus Meridius will have his vengeance. See them in Gladiator.
Bedside manner is for chumps, not the brilliant Dr. Gregory House. See them in House M.D..
Jonathan Byers is a kindhearted outcast who tends to be in the wrong place at the wrong time. See them in Stranger Things.
When Jessica Jones is not throwing back drinks, she's taking down bad guys with her strength, detective skills, and foul-mouthed insults. See them in Marvel Cinematic Universe.
Raphael is a short-fused hothead who loves a good fight and some tasty pizza. See them in Teenage Mutant Ninja Turtles.