Because you like Agatha Van Helsing in Dracula
Rose Tyler may have not done too well in school, but she's certainly holding her own in space. See them in Doctor Who.
Andrea Sachs' boss is not happy unless everyone around her is panicked, nauseous or suicidal. See them in The Devil Wears Prada.
Alex Dunphy's self-reliant intelligence comes with a healthy dash of sarcasm. See them in Modern Family.
Funny, bubbly, and relaxed, Emma has a magnetic personality that makes her the life of the party. See them in Blue is the Warmest Color.
Paris Geller is a newspaper editor, class president, and headed for Harvard. See them in Gilmore Girls.
A few millennia in the mortal realm have caused DEATH to be quite enamored of life. See them in Discworld.
A meticulous forensic scientist, Edward Nygma is insanely good at his job. Emphasis on the "insane" part. See them in Gotham.
Steve Rogers is a good soldier. But above all, he's a good man. See them in Marvel Cinematic Universe.
Hawkeye is most comfortable perched above the action, keeping an eye on everything and using a well-timed arrow to save the day. See them in Marvel Cinematic Universe.
Daring on a bike but haunted in his personal life, even Johnny Blaze isn't fast enough to outride his past. See them in Ghost Rider.
Liv Moore is a sarcastic high-achiever turned morally conflicted zombie. See them in iZombie.
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.