Severus Snape in Canon


Prisoner of Azkaban

Chapter 7
The Boggart in the Wardrobe


There was a noise like a whip crack. Snape stumbled; he was wearing a long, lace-trimmed dress and a towering hat topped with a moth-eaten vulture, and he was swinging a hug crimson handbag..

There was a roar of laughter; the Boggart paused, confused, and Professor Lupin shouted, "Parvati! Forward!"

Parvati walked forward, her face set. Snape rounded on her. There was another crack, and where he had stood was a blood-stained, bandaged mummy…
pg 137

"Forward, Neville, and finish him off!" said Lupin as the Boggart landed on the floor as a cockroach. Crack! Snape was back. This time Neville charged forward looking determined.

"Riddikulus!" he shouted, and they had a split second’s view of Snape in his lacy dress before Neville let out a great "Ha" of laughter, and the Boggart exploded, burst into tiny wisps of smoke, and was gone.
pg 139

Chapter 8
Flight of the Fat Lady


Worst of all was Potions. Snape was in a particularly vindictive mood these days, and no one was in any doubt why. The story of the boggart assuming Snape's shape, and the way that Neville had dressed it in his grandmother's clothes, had traveled through the school like wildfire. Snape didn't seem to find it funny. His eyes flashed menacingly at the very mention of Professor Lupin's name, and he was bullying Neville worse than ever.
pg 142