Because you like Annie Walker in Bridesmaids
Wanting more out of life, Pam Beesly has a job she isn't crazy about and is engaged to a guy she's not sure is "The One." See them in The Office.
Cisco Ramon is a proud, enthusiastic member of a superhero support team. See them in DC Extended Universe.
Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.
Growing up isn't easy: Chihiro's parents turned into pigs, she's enslaved at a bathhouse for demons, and oh yeah, she's fading from existence. See them in Spirited Away.
Milo Thatch is an enthusiastic researcher without cynicism. See them in Atlantis: The Lost Empire.
A superpowered test subject, Scarlet Witch can manipulate other people's thoughts and force them to confront their worst fears. See them in Marvel Cinematic Universe.
A daughter of a pair of superheroes, Hope van Dyne is scientist is brilliant and fearsome. See them in Marvel Cinematic Universe.
Korra is stubborn, outgoing, and faced with huge responsibilities she might not be ready for. See them in The Legend of Korra.
Gordie Lachance never had any friends later on like the ones he had when I was twelve. See them in Stand By Me.
Susanna Kaysen is an aspiring writer, despairing young woman who struggles with suicidal thoughts. See them in Girl, Interrupted.
Dr. Gordon Freeman is a brilliant physicist is a quiet hero. And given all the violent aliens, he better be. See them in Half-Life.