Because you like Spike in Buffy the Vampire Slayer
Edmund Pevensie isn't a bad person, but he did sell his siblings out for a tin of Turkish Delight. See them in The Chronicles of Narnia.
Cinderella will sacrifice herself to keep her family's memory alive. See them in Cinderella (Live Action).
Don't ask the ruthless queen of the Tokyo underworld any questions unless you're fine with losing a limb. See them in Kill Bill vol. 1.
Aerith Gainsborough has lived a simple life, but when the world is threatened she's willing to step up and do whatever she can to help. See them in Final Fantasy Series.
Darlene is a free-spirited hacktivist who follows her own moral compass. See them in Mr. Robot.
A short-tempered guy, Bowser is determined to wreak havoc on the Mushroom Kingdom. See them in Super Mario Bros..
The White Queen been treated horribly, but the day of her victory is almost near. See them in Alice in Wonderland.
High school is Hell, so Allison Reynolds spends her time giving herself tattoos with ballpoint pens and shaking dandruff out of her hair. See them in The Breakfast Club.
Will Byers is just like any other twelve year old, except he's stuck in another dimension. See them in Stranger Things.