J.K. Rowling assigned Harry Potter’s godfather Sirius Black to Gryffindor.
Sirius was sorted into Gryffindor during his time at Hogwarts, even though he came from the ancient Black family, which traditionally valued pure-blood wizarding beliefs. His school friends included James Potter, Remus Lupin, and Peter Pettigrew; together they became known as the Marauders.
Sirius appears first in Harry Potter and the Prisoner of Azkaban, where he is initially presented as a dangerous escaped prisoner. The story later reveals that he was wrongly imprisoned for the betrayal of James and Lily Potter and the deaths attributed to him. His connection to Harry is both familial and central to the book’s emotional conflict.
Gryffindor is also the house associated with Harry, Ron, and Hermione. The house’s stated qualities include courage, bravery, and nerve, traits that Rowling repeatedly connects with Sirius’s choices and loyalty.