Because you like Egon Spengler in Ghostbusters

Talos is a mysterious military commander skilled in the art of deception. See them in Marvel Cinematic Universe.

Xander Harris' life motto: laugh in the face of danger and then hide until it goes away. See them in Buffy the Vampire Slayer.

A free-spirited girl, Kim doesn't judge by appearances. See them in Edward Scissorhands.

Josh Lucas just can't stop hanging around his stepsister's house. See them in Clueless.

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.

Morticia Addams hates anything bright and cheery and loves all things ghoulish, ghastly, and violent. See them in The Addams Family.

Ofelia is face-to-face with the deadliest creatures of the underworld and completely unafraid. See them in Pan's Labryinth.

Moe Szyslak is the crabby owner of the grimiest bar in Springfield. See them in The Simpsons.

Jamie Fraser is a noble warrior with a romantic heart. See them in Outlander.

Foggy Nelson is a principled small-time lawyer fighting for fellow little guys. See them in Marvel Cinematic Universe.

Oscar Martinez is a national accountant in an office of weirdos. See them in The Office.

Handsome Jack is wearing a mask of his own face to hide his scarred real one. See them in Borderlands Series.