Sir Nicholas de Mimsy-Porpington, often referred to as Nearly Headless Nick, is a character from the Harry Potter series created by J.K. Rowling. He is a ghost who haunts Gryffindor Tower at Hogwarts School of Witchcraft and Wizardry. Nick is known for his nearly severed head, which gives him a comical appearance and a somewhat tragic backstory. Nick was once a wizard who lived during the Middle Ages and was known for his kind and gentle nature. He is a member of the Gryffindor house and often serves as a guide for students, particularly Harry Potter, Hermione Granger, and Ron Weasley. His character adds depth to the themes of friendship and acceptance in the series.