Because you like Titus Pullo in Rome

Nothing instills more fear in the Empire than the deep kshhh of Darth Vader breathing through his helmet. See them in Star Wars Series.

A benevolent madman with a blue box, The Doctor is traveling through time and space to heal the wounds of the universe. See them in Doctor Who.

Billionaire playboy by day and vigilante archer by night, Oliver Queen aims to rid Starling City of crime and atone for his past mistakes. See them in DC Extended Universe.

Kat Stratford is part of the "out" crowd and proud of it. See them in 10 Things I Hate About You.

His name is Olaf, he's a snowman, and he likes warm hugs. See them in Frozen.

Brilliant, violent, and only a little insane, the Joker doesn't listen to anyone except the voices in his head. See them in DC Extended Universe.

Regina Mills is a cold evil queen turned chilly town mayor. See them in Once Upon a Time.

This ice queen is learning to let it go. See them in Frozen.

Hiccup Haddock III may be the only Viking nerd in recorded history. See them in How to Train Your Dragon.

His murderous megalomania aside, Loki is quite charming. Just don't mention his strapping older brother; he's a tad jealous. See them in Marvel Cinematic Universe.

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

Smart and sensitive Sam Winchester tried to escape the family business, but ghosts have a way of haunting you. See them in Supernatural.