Because you like Rainbow Dash in My Little Pony

Rukia Kuchiki is a cool and collected warrior who has trouble opening up to anyone. See them in Bleach.

Nicky Nichols just wants to settle down with a nice girl, but being in prison is making that a little difficult. See them in Orange Is The New Black.

Twisted and seemingly soulless, Bellatrix Lestrange finds joy in making others suffer. See them in Harry Potter Series.

There's more to this sweet, caring landlady than meets the eye. See them in Sherlock.

A crabby troll, Karkat Vantas is perpetually angry about his lot in life. See them in Homestuck.

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.

A meek schoolteacher, Mary Margaret Blanchard can't remember her past as a spirited, swashbuckling Snow White. See them in Once Upon a Time.

Cat Grant gets what she wants: a piping hot latte or an interview with Supergirl. See them in Supergirl.

Leonard Hofstadter is the normal one among his scientist friends, though in fairness that's a low bar. See them in The Big Bang Theory.

Caleb Rivers is a bad boy with a good reason for acting out. See them in Pretty Little Liars.

A brilliant graduate student in Italy for "research," Oliver has other things on his mind: flirting, swimming, and dancing. See them in Call Me by Your Name.

Light Yagami has a plan to make a better world, and morals won't stop him. See them in Death Note.