What happened to Headless Nick from Harry Potter?

Sir Nicholas de Mimsy-Porpington, also known as "Nearly Headless Nick," is still a ghost residing at Hogwarts School of Witchcraft and Wizardry in the Harry Potter universe. He remains the resident ghost of Gryffindor Tower and continues to interact with the students and staff of the school. Throughout the series, he maintains his role as a friendly and somewhat mischievous presence at Hogwarts.