Dumbledore
Dumbledore is the Headmaster of Hogwarts of Witchcraft and Wizardry. He delivered baby Harry to his Aunt and Uncle in the middle of the night. He is an pretty brainy person and helps Harry and Hermione rescue Sirius from the Dementors. Dumbledore is also a hardcore rapper at heart.
Sirius Black
Sirius Black is Harry's Godfather and is James Potters best friend. He was imprisoned in Azkaban for a murder he didn't commit. He sent Harry a Firebolt for his thirteenth birthday.
Professor Snape
Snape is the potions master at Hogwarts. He hates Harry and he hates Harry's father James. Snape also enjoys singing Bootylicious when he thinks no one is watching. But we know your secret Snape, and we are not afraid to use it against you!
Professor McGonagall
Professor McGonagall is the Trasfiguration teacher at Hogwarts. She is the head of Gryffindor house and is an Animagus that can transform into a cat.
Hagrid
Hagrid is the Gamekeeper at Hogwarts and he looks after all the magical creatures in the grounds. He is also the Care of Magical Creatures teacher.