Minerva McGonagall

"Hogwarts is threatened! Man the boundaries. Protect us! Do your duty to our school!"

- McGonagall animating suits of armour in preparation for the Battle of Hogwarts

Minerva McGonagall was a Professor at Hogwarts, proud and loyal to Hogwarts, Dumbledore and Harry Potter. She is a stern, yet kind teacher for Transfiguration. Like pretty much everyone else, she hates Umbridge. When Argus Filch blames Harry petrified of his cat Mr. Norris, other students and Sir Nicolas she defends Harry from Argus and informed him that it was the Basilisk who did petrified Mr. Norris, Sir Nicolas and the other students.

Trivia

 * McGonagall was played by the English actress Dame Maggie Smith. Smith also portrayed the Reverend Mother in Sister Act and its sequel.