Because you like Simon Belmont in Castlevania
A suave manipulator, Sebastian Valmont is valiantly fighting off a developing conscience. See them in Cruel Intentions.
Aang is already a master airbender and once he learns to manipulate water, earth, and fire, he'll be truly unbeatable. See them in Avatar: The Last Airbender.
Carl Fredricksen is a crotchety old man who may just have it in him to take one last, great adventure. See them in Up.
Juno MacGuff is hoping sarcasm will get her through the stress of teenage life. And also, teenage pregnancy. See them in Juno.
If Lisbeth Salander can hurt a bastard who deserves it by digging up stuff about him, she feels good. See them in The Girl with the Dragon Tattoo.
Princess-turned-General Leia Organa is a sharp, fearless royal who gets herself into trouble and fights her way out of it. See them in Star Wars Series.
Quirky and wildly imaginative, Amelie finds joy in the unnoticed things in life and aspires to bring happiness to all. See them in Amelie.
Rupert Giles is a librarian on the outside, fearless evil-fighter on the inside. See them in Buffy the Vampire Slayer.
A fearless superhero, Carol Danvers always aims to go higher, further, faster. See them in Marvel Cinematic Universe.
Nozomu's name translates to despair, which is fitting for him. See them in Sayonara, Zetsubo Sensei.
The only constant in Night Vale is Cecil's hypnotic voice. See them in Welcome to Night Vale.