Because you like John Tyree in Dear John
A sarcastic and nosy tomboy, Stephanie Tanner is understandably not crazy about being the middle child. See them in Full House.
When the Sorting Hat touched Draco Malfoy's head, it placed him in Slytherin, a house that has turned out more dark wizards than any other. See them in Harry Potter Series.
Bran Stark discovered a scandelous family secret. He swore to keep quiet but soon found himself on the receiving end of attempted murder. See them in Game of Thrones.
Marv is a brutish but principled thug who'd be right at home on an ancient battlefield. See them in Sin City.
Artemis Fowl understands the way of the world. If he wins, he's a prodigy. If he loses, then he's crazy. That is how history is written. See them in Artemis Fowl.
Donna Carmichael is a free-spirited single mom and gracefully aging hippie. See them in Mamma Mia!.
Alex Danvers is a brilliant engineer tasked with alien threats, and one of those aliens is her adopted sister Supergirl. See them in Supergirl.
After Otto Octavius' accident, he becomes fixated on finishing the reactor at any cost. See them in Marvel Cinematic Universe.
Susan Pevensie is sensible, practical, and fiercely protective of those she loves. See them in The Chronicles of Narnia.
Good fashion? Check. Snarky quips? Check. Supernatural evil-fighting powers? Also check. See them in Buffy the Vampire Slayer.