Because you like Mark Watney in The Martian

Wanderer is a Soul, a parasite sent into a host to take over their body, extracting information from them and colonizing their species. See them in The Host.

Lyra Belacqua is prone to getting in trouble, but she's also clever enough to get out of it. Most of the time. See them in The Golden Compass.

Aimee Finecky has big dreams, but she's too busy taking care of everyone else's desires. See them in The Spectacular Now.

Peter Pan is a boy who never grew up. See them in Peter Pan.

A brilliant "extractor," Dom Cobb has spent the past few years running from the authorities and his inner demons. See them in Inception.

Marv is a brutish but principled thug who'd be right at home on an ancient battlefield. See them in Sin City.

Gruff and sarcastic, Detective Harry Dresden use unconventional ways to track down perps, including using magic and the supernatural. See them in The Dresden Files.

While Fantine's gentleness has led others to take advantage of her, it ultimately forces her to become stronger. See them in Les Miserables.

Jane Foster is an astrophysicist who suspects the colors in the sky may be a portal to another world. See them in Marvel Cinematic Universe.

There are certain souls the surprisingly sensitive Death would rather not reap. See them in The Book Thief.

Margo loves mysteries so much that she becomes one. See them in Paper Towns.

Running away from murderous aliens has turned into an interstellar chase for Jupiter Jones. See them in Jupiter Ascending.