Because you like Martha Jones in Doctor Who
Talos is a mysterious military commander skilled in the art of deception. See them in Marvel Cinematic Universe.
Blunt but anxious, Gretchen Ross bonds most easily with those who have lived tough lives like she has. See them in Donnie Darko.
Not only will Emmett Brown's time-saving gadgets help you travel with ease, his tinkering on your car will help you get wherever you need to go. Fast. See them in Back to the Future.
Izzie Stevens is a model-turned-med student who can do it all, even if people underestimate her. See them in Grey's Anatomy.
Kara "Starbuck" Thrace will beat you in cards, drink you under the table, then fly circles around you in her fighter plane. See them in Battlestar Galactica.
Davos Seaworth is steadfast, intelligent, and trustworthy, which are hard traits to find in a place like Westeros. See them in Game of Thrones.
Galina Reznikov is the head chef of prison, cooking up meals as well as storms on anyone who dares to cross her; even the guards are terrified of her. See them in Orange Is The New Black.
Red doesn't like to explain herself. She wants her work to do the talking. See them in Transistor.
Kumar Patel is always high, always hungry for sliders. See them in Harold & Kumar Go To White Castle.
Princess Bubblegum is brilliant and determined, but can display a nasty temper. See them in Adventure Time.
Kim Kelly is a high school bully who's normally in a bad mood. But there's a softer side to her. See them in Freaks and Geeks.
