Because you like Master Chief (John-117) in Halo
After several hundred years of shutting himself out from the rest of the world, Japan's not used to dealing with nations, See them in Axis Powers Hetalia.
For Morgana, sometimes wanting to do the right thing can led you down the wrong path. See them in Merlin.
Veronica Sawyer thinks that if you were happy every day of your life you wouldn't be a human being, you'd be a game-show host. See them in Heathers.
Rose Tyler may have not done too well in school, but she's certainly holding her own in space. See them in Doctor Who.
Emily Gilmore is the DAR chair, proud grandmother, and full of opinions. See them in Gilmore Girls.
Carolos has perfect hair, a lab coat, and a constant readiness to do science. See them in Welcome to Night Vale.
Tina Goldstein is better at getting the job done than following the rules. See them in Fantastic Beasts and Where To Find Them.
Emily Fields has been very guarded, careful of whom she trusts and reveals her secrets to. See them in Pretty Little Liars.
Fiery, intelligent, and opinionated, Jo March rebels against the restrictions of her era. See them in Little Women.
Number Five is a 58-year-old man trapped in his 13-year-old body. See them in The Umbrella Academy.
The ever-cheerful Tonks can change her appearance at will, but she can't seem to get rid of her clumsiness. See them in Harry Potter Series.