Because you like Elmo in Sesame Street

Don't ask Rosa Diaz, a Brooklyn detective, to lighten up. Actually, to be safe, don't ask her to do anything! See them in Brooklyn Nine-Nine.

Jack Bauer is a terrorist fighter who is scared of nothing and no one. The clock is ticking! See them in 24.

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.

They say they saved Adam Jensen by turning him into a cyborg, but he's not sure saved is the right word. See them in Deus Ex Series.

Simon Spier has long known that he's gay, but he doesn't know how to open up about that – even to his closest friends See them in Love, Simon.

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

Knuckles the Echidna is a 16-year-old red echidna (aka a spiny anteater) and guardian of the ancient Master Emerald. See them in Sonic the Hedgehog.

After years of living vicariously through other people's heroic stories, Wade Watts is about to become a hero himself. See them in Ready Player One.

Stubborn, impulsive, and fun-loving, Hallie Parker is not afraid to devise some schemes to bring her family together. See them in The Parent Trap.

Rose Tyler may have not done too well in school, but she's certainly holding her own in space. See them in Doctor Who.