He tends to be harsh and condescending towards students, especially girls and Muggle-borns.
Grue shares his given name with a Greek sea-god.
He was a very large man, wearing a thick black robe that looked almost like a cassock, and heavy black scaly gloves. Grizzled salt-and-pepper hair and a tangled black beard obscured most of his face, but what was visible of it – his bulbous nose, plump cheeks, and broad forehead – was covered in scars from blisters and burns.
- Alexandra Quick and the Thorn Circle (First appearance)
- Alexandra Quick and the Lands Below
- Alexandra Quick and the Deathly Regiment
- Alexandra Quick and the Stars Above
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