Because you like Will Newman in Five Feet Apart
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).
For the sake of science, Kurisu Makise will persevere no matter how deep into the dark secrets of the world she finds herself. See them in Steins;Gate.
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.
Undercover as an average high school student, Kallen Stadtfeld is actually most at ease when the action's fast, furious, and dangerous. See them in Code Geass.
A skating genius, Victor Nikiforov dazzles women and men with a single glance. But deep down he's a cheerful goof. See them in Yuri on Ice.
Jack's big imagination is never limited by his incredibly cramped surroundings. See them in Room.
Izzie Stevens is a model-turned-med student who can do it all, even if people underestimate her. See them in Grey's Anatomy.
Philip J. Fry accidentally cryogenically froze himself for a millennium. See them in Futurama.
There are rumors that the Spirit was an Egyptian Pharaoh in his past, but without any memories, he doesn't know how true they are. See them in Yu-Gi-Oh! .
Her unhappy childhood has left her unsure of the existence of happy endings. Mary Jane Watson hides her pain beneath a joke and a smile. See them in Marvel Cinematic Universe.
Bucky Barnes used to be a good-hearted American soldier. Now he's the cold-hearted Winter Soldier. See them in Marvel Cinematic Universe.