Because you like Carla Espinosa in Scrubs

Severus Snape is a misanthropic potions teacher with a vindictive streak. See them in Harry Potter Series.

Willow Rosenberg may be a witch who can defeat the forces of evil, but she still gets emotional over kittens on the Internet. See them in Buffy the Vampire Slayer.

Don't mess with Mickey Milkovich unless you want to see the wrong side of one of his many guns. See them in Shameless.

Luke Skywalker always wanted to leave home, but he didn't expect that it would be as part of a quest to rescue a princess and save the galaxy. See them in Star Wars Series.

Stuck on a lifeboat with zoo animals without food and fresh water, Pi Patel uses his intelligence to face the greatest test of all: survival. See them in Life of Pi.

When push comes to shove, the usually overly cautious Luigi has the heart of a hero. See them in Super Mario Bros..

You won't like him when Bruce Banner is angry. See them in Marvel Cinematic Universe.

Francis Freeman may be impervious to pain, but he sure knows how to inflict it. See them in Deadpool.

If you died and came back to life, and then died more times and came back, you might stop battling evil mutants. Not Jean Grey. See them in X-Men Series.

Whether it's punching a meteor or saving a teen from jumping, Superman tries to be in as many places as Kryptonianly possible. See them in DC Extended Universe.

Winnie the Pooh is a chubby little cubby all stuffed with fluff. See them in Winnie the Pooh.