Because you like Amy Pond in Doctor Who

There must be quite a lot of fellows who haven't got anybody to bring them tea in the morning. Bertie Wooster is lucky to have his valet, Jeeves. See them in Jeeves and Wooster.

Harrison Wells is a brilliant scientist full of secrets. See them in DC Extended Universe.

Jessica Rabbit isn't bad. She's just drawn that way. See them in Who Framed Roger Rabbit.

Dorothy Gale is a down-home Kansas girl in a bizarre fantasy land with beautiful red shoes. See them in The Wizard of Oz.

Stubborn, impulsive, and fun-loving, Hallie Parker is not afraid to devise some schemes to bring her family together. See them in The Parent Trap.

Cat Grant gets what she wants: a piping hot latte or an interview with Supergirl. See them in Supergirl.

Relentlessly cheerful and optimistic, Erin Hannon is an office receptionist. See them in The Office.

David Rossi may chase serial killers for a living, but he's more interested in what wine pairs well with tonight's parmigiana. See them in Criminal Minds.

Donkey is proof that if you're annoying enough you can change the world; he's the reason that his friend Shrek does, well, anything. See them in Shrek.

Will Turner is an earnest, lovelorn blacksmith's assistant with an adventurous spirit. See them in Pirates of the Caribbean: the Curse of the Black Pearl.

Ciri had a princess upbringing, and some of the facts of common people's lives are a mystery to her. See them in The Witcher.

The Genie is the perfect buddy, granting every wish we might have and keeping life good-spirited. See them in Aladdin.