Because you like Rapunzel in Tangled
Yukiteru is a reclusive observer who would rather watch life go by than participate in it. See them in The Future Diary.
For Sly Cooper, stealing isn't just about the haul. It's also about the journey. See them in Sly Cooper.
Annie Walker can bake a beautiful cupcake, but everything else in her life is a mess. See them in Bridesmaids.
The Terminator is an emotionless killing machine who won't stop until he's changed the future. See them in The Terminator.
Christian Grey is just as controlling in the bedroom as the boardroom. See them in Fifty Shades of Grey.
Jesse Tuck dreams of finding someone to join his unusual family. See them in Tuck Everlasting.
Courteous, dangerous, and powerful, Kaname Kuran controls an entire court of vampires. Very, very pretty vampires. See them in Vampire Knight.
After figuring out how both the light and dark halves of his soul could co-exist, Jak is maturing into a real hero. See them in Jak and Daxter.
When the Sorting Hat touched Draco Malfoy's head, it placed him in Slytherin, a house that has turned out more dark wizards than any other. See them in Harry Potter Series.
Sarah Kerrigan is pretty much the Queen Bitch of the Universe. See them in StarCraft .