McGonagall is first in The School of Groove. She is someone who was at first a main character and then POOF she wasn't. In Season 2 she is only in MGonagall Returns. In Season 3 she's in the New Teacher and in Season 4 she's in Part 1 and Part 3. McGonagall's signature spell is Aqua Pura. Her worst enemy is Contessa. In the episode The New Teacher McGonagall duels Boo which was very odd. McGonagall is played by Aaron Noble. McGonagall is one orange-haired teacher!