Because you like Steve Stifler in American Pie
Often on the verge of a nervous breakdown, Annie Edison nevertheless manages to be the brain of the Greendale study group. See them in Community.
Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.
Violet Harmon takes teen angst to a paranormal level. See them in American Horror Story.
Clementine Kruczynski thinks that too many guys think she's a concept, or she completes them, or she's gonna make them alive. See them in Eternal Sunshine of the Spotless Mind.
Courteous, dangerous, and powerful, Kaname Kuran controls an entire court of vampires. Very, very pretty vampires. See them in Vampire Knight.
Yukiteru is a reclusive observer who would rather watch life go by than participate in it. See them in The Future Diary.
The Genie is the perfect buddy, granting every wish we might have and keeping life good-spirited. See them in Aladdin.
A born psychopath, don't expect Michael Myers to understand the difference between right and wrong. See them in Halloween.
It's a race against time to develop his theory of the origins of the Universe before Stephen Hawking's body and mind give out. See them in The Theory of Everything.
Clarice Starling is patiently working with one serial killer to stop another. See them in The Silence of the Lambs.
There are certain souls the surprisingly sensitive Death would rather not reap. See them in The Book Thief.