Because you like Sam Vimes in Discworld

Altair Ibn-La'Ahad is as much a philosopher and detective as he is a killer. He takes nothing at face value and continually searches for deeper truths. See them in Assassin's Creed Series.

GLaDOS will supply the food when you get together: a delicious cake. Of course, it could just be a trap so she can kill you. It’s hard to say. See them in Portal Series.

Shuri is a genius-level inventor with a wicked sense of humor. See them in Marvel Cinematic Universe.

Frodo might have carried the ring, but Samwise Gamgee carried the ring bearer. See them in The Lord of the Rings.

Offred wisely keeps her head down even as she hopes for more. Unfortunately, hope is dangerous in Gilead. See them in The Handmaid's Tale.

When a half-breed breaks the rules, John Constantine deports them straight back to hell. He's trying to buy his way into heaven. See them in Constantine.

A fearless superhero, Carol Danvers always aims to go higher, further, faster. See them in Marvel Cinematic Universe.

Everyone is just a chess piece, and Izaya Orihara is a master player. See them in Durarara!!.

Insightful about everyone else's neuroses, Rose Lalonde is not as aware of her own. See them in Homestuck.

A meticulous forensic scientist, Edward Nygma is insanely good at his job. Emphasis on the "insane" part. See them in Gotham.

Jamal Malik came from humble beginnings in an Indian slub filled with street gangs, but he is destined for bigger things. See them in Slumdog Millionaire.