Because you like Nymphadora Tonks in Harry Potter Series

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

Tobias "Four" Eaton is only afraid of four things, but you should probably be afraid of him. See them in Divergent.

A wildly brilliant detective, Sherlock Holmes can figure out everything except how to interact with other human beings. See them in Sherlock.

As Marlena Rosenbluth is finding out, confidence in the limelight doesn't always translate to power at home. See them in Water for Elephants.

Chandler Bings keeps his friends on their toes with his cutting wit, all the while trying to discover his own place in life. Could he BE any funnier? See them in Friends.

John Watson is haunted by his past (who isn't) but he's starting to branch out with some help from a world class detective. See them in Sherlock.

There's never a dull moment when this mischievous high-schooler gets up to his hijinks. Save Ferris! See them in Ferris Bueller's Day Off.

Pro tip: the psych ward is not the best place to find a mentor like Lisa Rowe. See them in Girl, Interrupted.

The star of every school production since kindergarten and the most popular girl of East High, Sharpay Evans usually gets her way. See them in High School Musical.

Eren Jaeger will erase the Titans from this world until not a single one remains. See them in Attack on Titan.