Because you like O-Ren Ishii in Kill Bill vol. 1
Meat Boy tenaciously throws himself into danger, and when he fails, he immediately gets back up and tries again. See them in Super Meat Boy.
Although Theon Greyjoy is treated well, he's still essentially a hostage. And that isn't so easy for him to forgive. See them in Game of Thrones.
A vain and arrogant womanizer, Roy Mustang has hidden depths. See them in Fullmetal Alchemist.
Make sure not to anger the Hulk or else he will transform into a giant green monstrosity and smash anything in his way. See them in Marvel Cinematic Universe.
The poster child for relentless cheer and resilience, Kimmy Schmidt may be an abuse survivor but she's also a lover of dancing and karaoke, candy, and dolphins. See them in Unbreakable Kimmy Schmidt.
While Fantine's gentleness has led others to take advantage of her, it ultimately forces her to become stronger. See them in Les Miserables.
A gentle alchemist who is soul-bound to a giant suit of armor, Alphonse Elric is growing into the responsibility handed to him. See them in Fullmetal Alchemist.
Freelance writer Diane is dating a dog and writing a memoir of a horse. See them in Bojack Horseman.
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.
Tidus is upbeat, carefree, and desperate not to become his father. See them in Final Fantasy Series.
England may cultivate the image of a well-bred gentleman, but he has both the temper and mouth of a seasoned sailor. See them in Axis Powers Hetalia.