Because you like James P. Sullivan in Monsters, Inc.
Smart, sarcastic, and loyal, Stiles Stilinski doesn't just want to be the sidekick in someone else's life. See them in Teen Wolf.
When the going gets tough, Rick Grimes gets tougher. It's a very useful trait when the world goes to hell. See them in The Walking Dead.
Nomi Marks is a brilliant hacker with an open-minded, accepting spirit. See them in Sense8.
Noah Calhoun is lost without Allie, who seems to have moved on. See them in The Notebook.
Daenerys Targaryen will take what is hers with fire and blood. Thankfully, she has some dragons by her side. See them in Game of Thrones.
Shaun is used to being lazy. And now, you're asking him to fight for his life? See them in Shaun of the Dead.
With the loyalty and pluckiness of a puppy, Nana Komatsu is a hopeless romantic. See them in Nana.
Sookie Stackhouse is a waitress who can read minds and break hearts. See them in True Blood.
Tina Belcher is on the cusp of puberty, and she has no shame when it comes to boys, butts, and brassieres. See them in Bob's Burgers.
Duck, girl, and legend: Ahiru's identities confuse even herself at times, and she often wonders which of them is truly her. See them in Princess Tutu.
Sheldon Cooper is brilliant in every way except, well, interacting with any human being. See them in The Big Bang Theory.