Because you like Alyx Vance in Half-Life 2

Emma Woodhouse knows what's best for everyone else. Just don't try to tell her what to do. See them in Emma.

Nadja was feminasty before it was cool. See them in What We Do In The Shadows.

Sam Montgomery works hard, but her evil stepmother makes sure her efforts don't pay off. See them in A Cinderella Story.

Charlie Kelmeckis is a wallflower who's starting to blossom into something more. See them in The Perks of Being a Wallflower.

Jenna Rink is physically 30 but emotionally 13. She has a better excuse than most. See them in 13 Going on 30.

A suave womanizer, Jacob Palmer has turned seduction into a science. See them in Crazy, Stupid Love.

High school is Hell, so Allison Reynolds spends her time giving herself tattoos with ballpoint pens and shaking dandruff out of her hair. See them in The Breakfast Club.

A hurricane of a human being, Marla Singer is destructive and unforgettable. See them in Fight Club.

Don't underestimate Maggie Greene. She's a farm girl with a mission. See them in The Walking Dead.

Summer Roberts is privileged and preppy but also surprisingly open-minded and fiercely loyal. See them in The O.C..

Irene Adler has to use both her brains and her body to survive. Luckily, she's usually the most brilliant person in the room. See them in Sherlock.

Matt Flamhaff is not too concerned about being part of the popular crowd. Too bad his best friend is. See them in 13 Going on 30 .