Because you like Denny Duquette in Grey's Anatomy

James Wilson is a compassionate doctor who willingly plays the sidekick. See them in House M.D..

Bobby Singer is a redneck ghost hunter, but all he wants to do is retire to the junk yards of South Dakota. See them in Supernatural.

Michael Moscovitz is a high school student of few words but a lot of heart. See them in The Princess Diaries.

Caitlin Snow believes that burying herself in science is the best way to save the day or to mend a broken heart. See them in DC Extended Universe.

Boomerang is equally skilled at tossing boomerangs and tossing back beers. See them in DC Extended Universe.

Though he may be blind, Chirrut Imwe sees the power of the force more than most. See them in Rogue One.

Shawn Hunter may be a bit of a rebellious bad boy, but he has a heart that's pure gold. See them in Boy Meets World.

Margaery Tyrell is one of the most adept and charming liars there is. See them in Game of Thrones.

On the bright side, Mindy Lahiri is always willing to volunteer her opinion. On the dark side, this doc’s prescriptions can be misguided and shallow. See them in The Mindy Project.

Rupert Giles is a librarian on the outside, fearless evil-fighter on the inside. See them in Buffy the Vampire Slayer.

This android may not have emotions, but Lt. Commander Data's curiosity about humanity is endless. See them in Star Trek: The Next Generation.

CIA operative Carrie Mathison is on a self-assigned mission to follow a lead, whether it be the truth or just her delusions playing tricks. See them in Homeland.