Because you like Strax in Doctor Who
Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.
Billy Batson is a troublemaking teen grappling with a pretty weird superhero identity crisis See them in DC Extended Universe.
Herion is Mark Renton's favorite drug. He sniffs it, smokes it, swallows it, sticks it up his arse, and injects it into his veins. See them in Trainspotting.
A brave but pessimistic nobleman, Boromir knows one does not simply walk into Mordor. See them in The Lord of the Rings.
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.
The fearless bodyguard of Rick Flag, Katana will ruthlessly kill her enemies, trapping their souls in her sword. See them in DC Extended Universe.
Pure charm, flirty and fashionable, Lando Calrissian will make sure to get the job done when necessary. See them in Star Wars Series.
Hank McCoy is a quintessential nerdy scientist but with a few rather unconventional physical attributes. See them in X-Men Series.
No one has seen The Mandalorian without his helmet since he swore the creed. See them in The Mandalorian.
Darcy Lewis is a razor-sharp scientist studying things that science can't explain. See them in Thor.