Because you like Scott McCall in Teen Wolf
A grumpy tourist trap owner, Grunkle Stan has a few deep secrets. See them in Gravity Falls.
Rose Tyler may have not done too well in school, but she's certainly holding her own in space. See them in Doctor Who.
Jessica Rabbit isn't bad. She's just drawn that way. See them in Who Framed Roger Rabbit.
Frodo might have carried the ring, but Samwise Gamgee carried the ring bearer. See them in The Lord of the Rings.
Jenny Flint is a devoted wife and daring crime fighter, which is pretty unconventional for a Victorian maid. See them in Doctor Who.
Elio Perlman likes the piano, peaches, and his father's new research assistant a little too much. See them in Call Me by Your Name.
Give in to the dark side with vampire Lestat; it's more fun. See them in Interview with the Vampire: The Vampire Chronicles.
Toph is a tenacious earthbender full of spirit and spunk and hates when people try to baby her because she's blind. See them in Avatar: The Last Airbender.
Evan is a sensible kid, but being sensible isn't going to help him lose his virginity. See them in Superbad.
Rainbow Dash's interests include flying, playing pranks, and generally being themost awesome pony around. See them in My Little Pony.
Britta Perry has never met a cause she couldn't passionately champion—at least for a little bit. See them in Community.