Because you like Stanley Yelnats in Holes
Kenzo Tenma would have never guessed that ten-year-old he saved would later become a deadly serial killer intent on "thanking" him. See them in Monster (TV Show).
Liesel Meminger is trying to ease the suffering of those around her, German and Jew alike. See them in The Book Thief.
Spike Spiegel is a bounty-hunter with a laidback style and lightning-quick moves. See them in Cowboy Bebop.
A suave manipulator, Sebastian Valmont is valiantly fighting off a developing conscience. See them in Cruel Intentions.
Ahsoka Tano hopes to be a very powerful and knowledgeable Jedi one day. See them in The Clone Wars.
Louise Belcher might be just a kid, but she can manipulate just about anyone with a pulse. All in the name of fun, of course. See them in Bob's Burgers.
It's easy to see why Poe Dameron would side with the rebellion: he's bad at taking orders, likes to show off, and is committed to the cause. See them in Star Wars Series.
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.
Academics weren't his strong suit. Luckily, Jesse Pinkman's street smarts are a cut above the rest. See them in Breaking Bad.
Small in stature, Clara Oswald has a big appetite for adventure. See them in Doctor Who.
Will Byers is just like any other twelve year old, except he's stuck in another dimension. See them in Stranger Things.