Because you like Bernadette Rostenkowski in The Big Bang Theory
Kara "Starbuck" Thrace will beat you in cards, drink you under the table, then fly circles around you in her fighter plane. See them in Battlestar Galactica.
Galina Reznikov is the head chef of prison, cooking up meals as well as storms on anyone who dares to cross her; even the guards are terrified of her. See them in Orange Is The New Black.
Turanga Leela is the daughter of two mutants who live in the sewers below New York City. See them in Futurama.
A self-proclaimed diva, Mercedes Jones is on the hunt for a stage worthy of her talents. See them in Glee.
From arguing for democracy in the Galactic Senate to pursuing a forbidden romance, Padme Amidala handles danger gracefully. See them in Star Wars Series.
Logan Huntzberger is a daredevil, romantic, and heir to a media empire. See them in Gilmore Girls.
For Wreck It Ralph, it's not easy being the bad guy. Especially when you've been designed to destroy but really desire love. See them in Wreck-It Ralph.
Lucius Malfoy is a judgmental social climber who has a bigoted superiority complex. See them in Harry Potter Series.
A jealous woman is dangerous. A jealous assassin woman like Elle Driver is even more so. See them in Kill Bill vol. 1.