Because you like Martha Jones in Doctor Who
Hotheaded and arrogant, Kaneda is nevertheless fiercely protective of the biker gang he leads. See them in Akira.
Not only could Hellboy avenge your death, he'd also have a sense of humor about it and not let it ruin the rest of his night. See them in Hellboy.
As Jane Villanueva grapples with a truly unexpected pregnancy, she realizes that her life is "now the stuff of telenovelas." See them in Jane the Virgin.
Moving is hard for Coraline Jones; accidentally moving to a creepy mirror world just makes it harder. See them in Coraline.
The adventurous daughter of Port Royal's governor, Elizabeth Swann would rather conspire with pirates than sit pretty in her corset. See them in Pirates of the Caribbean: the Curse of the Black Pearl.
Optimus Prime is a shapeshifting sentient robot leading a team of robots to stop evil from taking over. See them in Transformers.
Thankfully, Jenna Hamilton has her sense of humor and friends to get her through the endless torture that is high school. See them in Awkward..
Sarah Ashburn lives life by the book and has trouble getting along with anyone who doesn't do the same. See them in The Heat.
Annie Walker can bake a beautiful cupcake, but everything else in her life is a mess. See them in Bridesmaids.
Faith balances her adventurous thrill-seeking attitude with a righteous passion for justice. See them in Mirror's Edge.