Hermione Granger
The cleverest witch of her age, and perhaps the Hogwarts student most responsible for defeating Voldemort, arguably even moreso than Harry Potter himself.
Where is she from?
One of the three main characters of the Harry Potter novels. The intense, concentrated awesomeness of Hermione is very, very difficult to overstate. She is absolutely the coolest.
Hermione was a central character in the word-wide phenomenon that is the Harry Potter movies. She was played, from ages 10-20, by Emma Watson, who is likewise incredibly awesome.
British stage actress Noma Dumezweni originated the role of Hermione in the play Harry Potter and the Cursed Child, delightfully establishing the fact that Hermione has, this entire time, been a person of color. The internet predictably imploded.