Because you like Marv in Sin City
Chanel Oberlin is a big fan of herself, and she can't see why anyone else wouldn't be too. See them in Scream Queens.
How is angel Aziraphale supposed to stop the apocalypse when Hell's forces misplaced the Antichrist somewhere? See them in Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch.
For someone who swears she doesn't care for anyone, MJ Jones spends a lot of time observing her classmate Peter Parker. See them in Marvel Cinematic Universe.
Hanna Marin is a determined girl defined by her ability to transform herself. See them in Pretty Little Liars.
Eren Jaeger will erase the Titans from this world until not a single one remains. See them in Attack on Titan.
America Singer is a feisty, fiercely independent musician who places little value on the restrictive rules of her society. See them in The Selection .