Because you like Mark Watney in The Martian
Francis Freeman may be impervious to pain, but he sure knows how to inflict it. See them in Deadpool.
Will Herondale is an emotionally distant bad boy with a secret. See them in Clockwork Angel .
Tobias "Four" Eaton is only afraid of four things, but you should probably be afraid of him. See them in Divergent.
Margo loves mysteries so much that she becomes one. See them in Paper Towns.
A tough tomboy with a protective streak, Maximum Ride is a human-bird hybrid. See them in Maximum Ride.
Formerly a "sweater-set-wearing, mojito-drinking sorority girl", Paige Collins is now a successful sculptor with slight memory loss. See them in The Vow.
If you died and came back to life, and then died more times and came back, you might stop battling evil mutants. Not Jean Grey. See them in X-Men Series.
R is sweet for a zombie. See them in Warm Bodies.
With an A.I. as loyal and witty as Cortana, who needs humans? See them in Halo.
Gruff and efficient, Sam Fisher protects a nation that can never admit he exists. See them in Tom Clancy's Splinter Cell.
Cinder has been beaten down by the world, but she's learning that her cyborg abilities are pretty helpful. See them in Cinder .
We're all puppets. Dr. Manhattan is just a puppet who can see the strings. See them in Watchmen.