Because you like Alastar Mad-Eye Moody in Harry Potter Series
Andrew Glouberman is trying to make it through puberty with his sanity intact. See them in Big Mouth.
Brilliant, violent, and only a little insane, the Joker doesn't listen to anyone except the voices in his head. See them in DC Extended Universe.
Lois Lane's journalistic success is the result of her tenacity. She will doggedly pursue her leads until discovering the information she needs. See them in DC Extended Universe.
Ash Williams is a houseware clerk at S-Mart and the Chosen One. See them in The Evil Dead.
Jack's big imagination is never limited by his incredibly cramped surroundings. See them in Room.
A responsible kid, Hugo Cabret is still capable of flights of fancy. See them in Hugo.
Quentin Coldwater has always suspected there was something different about him, and now he has the chance to prove it. See them in The Magicians.
Andy Dwyer might not be completely literate, but he makes up for it in spirit. See them in Parks and Recreation.
An infamous vampire, Alucard is a one-man killing machine with a philosophical side. See them in Hellsing.
Dominic Toretto lives his life "a quarter mile at a time", and he burns through those miles faster than anyone. See them in The Fast and the Furious.
An agile and powerful swordswoman, Saber is a dignified warrior down to her bones. See them in Fate/Stay Night.