Because you like Gina Linetti in Brooklyn Nine-Nine
Formerly a "sweater-set-wearing, mojito-drinking sorority girl", Paige Collins is now a successful sculptor with slight memory loss. See them in The Vow.
In his transformation from hardened convict to moral paragon, Jean Valjean is the kind of man we should all aspire to be. See them in Les Miserables.
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.
Trying to get through school without being a burden to anyone, Tohru Honda stays cheerful despite her difficulties. See them in Fruits Basket.
Rayman is a fearless hero who flies into action with a propeller on his head and a smile on his face. See them in Rayman.
Maka is determined to collect and purify 99 Kishin eggs– human souls that have been corrupted by evil– and one witch soul. See them in Soul Eater.
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.
Sydney Novak claims she’s “not special,” but her self-reportedly average life changes quickly once she begins to develop powers she can’t control. See them in I Am Not Okay With This.
Castiel might be an immortal angel, but the human world is still more than a little confusing. See them in Supernatural.
When the going gets tough, Rick Grimes gets tougher. It's a very useful trait when the world goes to hell. See them in The Walking Dead.