Because you like The Terminator in The Terminator
Sharply perceptive and stubbornly principled, Jane Eyre might not have a very loud voice, but she knows when and how to use it. See them in Jane Eyre.
Nina Sayer finally landed the role of prima ballerina, but as tension ramps up in rehearsal, she starts losing her mind. See them in Black Swan.
Maria Rambeau is a tough-as-nails Air Force pilot who is also a loving single mom. See them in Marvel Cinematic Universe.
His murderous megalomania aside, Loki is quite charming. Just don't mention his strapping older brother; he's a tad jealous. See them in Marvel Cinematic Universe.
Matilda Wormwood is so smart, she taught herself how to be psychic. See them in Matilda.
A legendary warrior with a complicated relationship to the truth, Jaime Lannister is revered and reviled in equal measure See them in Game of Thrones.
Socialite-turned-runaway-turned-waitress, Rachel Green is the legendary story of riches to rags, trying to work her way up again with the help of her friends. See them in Friends.
Regina George is teen royalty. And anything the queen bee says, goes. See them in Mean Girls.
Whatever Sakura Haruno lacks in power, she makes up for in intelligence and bravery. See them in Naruto.
What Ron Weasley lacks in motivation and book smarts, he makes up for in loyalty and street smarts. See them in Harry Potter Series.
John Watson is haunted by his past (who isn't) but he's starting to branch out with some help from a world class detective. See them in Sherlock.