Because you like The Stranger in A Fistful of Dollars
Clank is the quintessential rational, intelligent robot sidekick. See them in Ratchet & Clank.
An underdog with nothing left to lose, Donnie Creed has everything to prove. See them in Creed.
Kara "Starbuck" Thrace will beat you in cards, drink you under the table, then fly circles around you in her fighter plane. See them in Battlestar Galactica.
Big Boss is a disillusioned mercenary commander who wants to create a world for soldiers (and soldiers alone). See them in Metal Gear Series.
Dee Reynolds is selfish, narcissistic, and a target of extremely cruel ridicule. See them in It's Always Sunny in Philadelphia .
Jack Bauer is a terrorist fighter who is scared of nothing and no one. The clock is ticking! See them in 24.
The fearless bodyguard of Rick Flag, Katana will ruthlessly kill her enemies, trapping their souls in her sword. See them in DC Extended Universe.
Darcy Lewis is a razor-sharp scientist studying things that science can't explain. See them in Thor.
Hank McCoy is a quintessential nerdy scientist but with a few rather unconventional physical attributes. See them in X-Men Series.
If anyone can stay optimistic and friendly under harsh alien rule, it's Alyx Vance. See them in Half-Life 2.
Raz is a 10-year-old boy who mostly stays in his own head, which makes sense since that's where he is strongest. See them in Psychonauts.