Because you like Rarity in My Little Pony
Peter Kavinsky is a jock who only cares about getting back at his ex, or so he says. See them in To all The Boys I've Loved Before.
For the sake of science, Kurisu Makise will persevere no matter how deep into the dark secrets of the world she finds herself. See them in Steins;Gate.
Reckless, vulgar, loud-mouthed: that's what makes Amethyst so awesome. See them in Steven Universe.
N'Jadaka is a righteous man with a violent agenda. See them in Marvel Cinematic Universe.
Mabel Pines loves sparkles, animals, friendship, and fun. See them in Gravity Falls.
Shana is a red-haired warrior with a black-and-white worldview. See them in Shakugan no Shana.
The personification of America is all about superheroes, hamburgers, and spreading democracy and justice. See them in Axis Powers Hetalia.
Sideshow Bob is a bitter ex-performer who was forced to do inhumane stunts for slapstick comedy. Now he's exacting revenge on his former boss, a clown. See them in The Simpsons.
Gomez Addams fills his days with ghoulish and ghastly forms of recreation, enjoying life and all its pleasures to the fullest. See them in The Addams Family.
If it were up to her, Merida would spend her days practicing archery and swordfighting, riding her horse, and exploring the Highlands. See them in Brave.
Luis is a deliverer of silver linings and long-winded stories. See them in Marvel Cinematic Universe.