Gregory the Smarmy was a medieval wizarding inventor who created Gregory’s Unctuous Unction, a potion which induces the drinker to believe that the one who gave them the potion is their best friend (FW).
Potion making and inventing
Other canon notes and references
A statue of Gregory the Smarmy stands in a corridor on the fifth floor of Hogwarts; there is a secret passageway behind it leading out of the school (PS9). This corridor was also the scene of Fred and George's portable swamp and subsequent flight for freedom (OP29).
Gregory the Smarmy
Dates fl. Middle Ages
Species / Race Wizard
First Introduced PS9: The Midnight Duel
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