Because you like Boromir in The Lord of the Rings
R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.
His name is Inigo Montoya and whoever killed his father should be prepared to die. See them in The Princess Bride.
Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.
A no-nonsense pro, Agent K has dedicated his whole life to his job. See them in Men in Black.
Though he may be blind, Chirrut Imwe sees the power of the force more than most. See them in Rogue One.
Thanos is an intergalactic warlord, on the hunt for infinite power. See them in Marvel Cinematic Universe.
Samwell Tarly is a scholar, not a fighter. But that's not good for an aspiring member of the Night's Watch. See them in Game of Thrones.
Chewbacca is a loyal co-pilot who won't hesitate to rip your arm off. See them in Star Wars Series.
Amy Farrah Fowler deserves sainthood for putting up with Sheldon Cooper. See them in The Big Bang Theory.
Beneath Arthur's brash demeanor lurks the heart of a compassionate future king destined to unite the five kingdoms. See them in Merlin.