Because you like Miranda Bailey in Grey's Anatomy
Big Boss is a disillusioned mercenary commander who wants to create a world for soldiers (and soldiers alone). See them in Metal Gear Series.
Despite this being Robin Buckley's first rodeo with the strange things that go down in Hawkins, she is quick to adapt and proves herself to be a loyal friend. See them in Stranger Things.
An underdog with nothing left to lose, Donnie Creed has everything to prove. See them in Creed.
Simon Belmont is a vampire hunter bravely carrying on the family business. See them in Castlevania.
The pasta-loving, skirt-chasing personification of North Italy, Feliciano Vargas is decidedly a lover, not a fighter. See them in Axis Powers Hetalia.
A crabby troll, Karkat Vantas is perpetually angry about his lot in life. See them in Homestuck.
The Terminator is an emotionless killing machine who won't stop until he's changed the future. See them in The Terminator.
Dory is more than a little forgetful, but she'll always remember to have your back. See them in Finding Nemo.
A resourceful ship systems engineer, Isaac Clarke does his best to batttle the infection spreading across space. See them in Dead Space.
Gollum is slimy and seething with hatred, the last person you would want to meet in a dark cave. See them in The Lord of the Rings.
Raphael is a short-fused hothead who loves a good fight and some tasty pizza. See them in Teenage Mutant Ninja Turtles.
Everyone is just a chess piece, and Izaya Orihara is a master player. See them in Durarara!!.