Because you like Mason in Boyhood
Merlin is half awkward teenager, half super-powerful wizard. He serves Prince Arthur of Camelot during the day and illegally learns magic at night. See them in Merlin.
Lucius Malfoy is a judgmental social climber who has a bigoted superiority complex. See them in Harry Potter Series.
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.
Misato Katsuragi is never without a beer in her hand or her pet penguin by her side. See them in Neon Genesis Evangelion.
The main priority for Nagisa Hazuki is making sure that everyone has fun. See them in Free! Iwatobi Swim Club.
Extremely violent and loyal, Sandor Clegane is called the Hound for a reason. See them in Game of Thrones.
Jo Wilson is an accomplished doctor who's getting over her past. See them in Grey's Anatomy.
Donkey is proof that if you're annoying enough you can change the world; he's the reason that his friend Shrek does, well, anything. See them in Shrek.
The only defense Earth has against alien invaders are giant robots in the hands of pilots like Kaworu. See them in Neon Genesis Evangelion.
Rainbow Dash's interests include flying, playing pranks, and generally being themost awesome pony around. See them in My Little Pony.
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.