Sprout, Trelawney, Umbridge
Hey, it's not my fault people underappreciate them. Irma Pince is really dedicated to her work and I like librarians, Pomfrey has saved and tended to a lot of important characters multiple times, and Madam Hooch looks and is just awesome. The three of them have contributed to Hogwarts more than Charlie. He was barely there anyway. He's just cool because he played with dragons.
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Oh, I am one yet many.