Because you like Katherine Wilson in Mona Lisa Smile
Charles Boyle is the human equivalent of a puppy, only slightly less adorable. See them in Brooklyn Nine-Nine.
When the safety of Hyrule is at stake, Princess Zelda does not hesitate to sacrifice herself for the good of the land. See them in The Legend of Zelda.
When his friend goes missing, Lucas Sinclair is ready to fight. All of the Dungeons and Dragons is really paying off. See them in Stranger Things.
Jason Bourne is suffering amnesia, but considering what he's done as a CIA assassin, maybe that's for the best. See them in The Bourne Identity.
A meticulous forensic scientist, Edward Nygma is insanely good at his job. Emphasis on the "insane" part. See them in Gotham.
Vash might act like a carefree, peace-loving goof, but it's not wise to underestimate this "Humanoid Typhoon." See them in Trigun.
Viking Astrid Hofferson has it all: brains, brawn, and some killer braids. See them in How to Train Your Dragon.
The destroyer, Drax lives for one thing and one thing only: revenge. See them in Marvel Cinematic Universe.
Rose Tyler may have not done too well in school, but she's certainly holding her own in space. See them in Doctor Who.
Merlin is half awkward teenager, half super-powerful wizard. He serves Prince Arthur of Camelot during the day and illegally learns magic at night. See them in Merlin.