Sir Nicholas de Mimsy-Porpington, nicknamed Nearly Headless Nick is a character in the Harry Potter franchise. He is the Gryffindor local ghost. He was a wizard of the royal court as an adult. He was executed by an improper decapitation, after he had a magical mishap with Lady Grieve, in which he tried to straighten her teeth but it backfired and she grew tusks. Since then, he became the resident ghost of Gryffindor Tower at the Hogwarts Castle.