Because you like Amy Pond in Doctor Who
Arwen has to choose between a life of loneliness or love and inevitible death, both rather unfortunate options. See them in The Lord of the Rings.
Shuri is a genius-level inventor with a wicked sense of humor. See them in Marvel Cinematic Universe.
Johannes Betzler is an overwhelmed little boy caught up in deeply confusing times. See them in Jojo Rabbit.
Sydney Bristow is a kick-ass double agent on a mission for revenge. See them in Alias.
Andy Dwyer might not be completely literate, but he makes up for it in spirit. See them in Parks and Recreation.
Frodo might have carried the ring, but Samwise Gamgee carried the ring bearer. See them in The Lord of the Rings.
Effie Trinket is utterly enamored with all things fashion, make-up, and style. See them in The Hunger Games .
A no-nonsense pro, Agent K has dedicated his whole life to his job. See them in Men in Black.
Drusilla's hobbies include dolls, music, and killing people. See them in Buffy the Vampire Slayer.
In a rag-tag group of kids determined to take down the imperialistic Fire Lord, Katara is the glue that holds them together. See them in Avatar: The Last Airbender.
A powerful priestess, Melisandre is shrouded in mystery and lots of red. See them in Game of Thrones.