Because you like Donna Carmichael in Mamma Mia!
John Wick is a widowed former Navy Seal who becomes a notoriously effective hitman, killing over 124 people with gunshots alone. See them in John Wick.
Joe Goldberg works at a local bookstore and charms most girls sock's off. He is also a serial killer, but no one is perfect! See them in You.
Think you grew up fast? At 12, Mathilda is an aspiring assassin eager to avenge her family's murder. See them in Leon: The Professional.
There's magic behind Tara Maclay's quiet façade. See them in Buffy the Vampire Slayer.
If Jack Torrance is one of his moods, you'll be the unlucky victim of the most bone-chilling, sinister yellers around. Bring your own axe. See them in The Shining.
Jeff Winger thinks he's too cool for school, which is a problem because he just enrolled in community college. See them in Community.
Jesse Tuck dreams of finding someone to join his unusual family. See them in Tuck Everlasting.
The vampire that killed Zero Kiryu's family also infected him, and he starts to crave blood, much to his horror. See them in Vampire Knight.
There's nothing like discovering dear old dad is a serial killer to send you into an (understandable) funk. See them in Hannibal.
A believer in the philosophy of Nietzsche, Dwayne Hoover has taken a vow of silence until he becomes a test pilot for the Air Force. See them in Little Miss Sunshine.
Wheatley's got an endless supply of bad ideas that he wants to share. See them in Portal Series.