Because you like Jim Stark in Rebel Without A Cause
There's nothing like discovering dear old dad is a serial killer to send you into an (understandable) funk. See them in Hannibal.
Garnet is a Crystal Gem who'll protect her friends with her life. See them in Steven Universe.
An inter-dimensional demon, Bill Cipher dreams of a more chaotic Gravity Falls. See them in Gravity Falls.
With an abundant supply of alcohol, nice restaurants, and free will, Crowley is a demon who is thoroughly enjoying his time on Earth. See them in Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch.
Andrea Sachs' boss is not happy unless everyone around her is panicked, nauseous or suicidal. See them in The Devil Wears Prada.
Beneath Yuji Sakai's meek exterior lies an exceptionally keen mind and a strong inner will. See them in Shakugan no Shana.
L is enigmatic, child-like, and one of the smartest people in the world. See them in Death Note.
Tifa Lockhart is part mother hen, part martial arts bad-ass. See them in Final Fantasy Series.
Franklin "Mouse" Finbar is a jock paying the price for his mistake. See them in Jumanji.
An off-beat dork, John Egbert is funny, inventive, and endlessly optimistic. See them in Homestuck.
Mitchell Pritchett prefers to have a place for everything and everything in its place. See them in Modern Family.
Penelope Garcia is the smartest ex-con turned FBI tech, but her fashion never fails to raise eyebrows. See them in Criminal Minds.