What animal is J.K. Rowling’s Patronus?

J.K. Rowling’s Patronus is an otter.

Rowling has described the otter as her favourite animal, and she gave that form to her own Patronus in the Harry Potter universe. In the stories, a Patronus is a magical guardian produced by the charm Expecto Patronum. It commonly appears as a luminous animal and is used especially against Dementors.

The otter also has a connection to Hermione Granger, whose Patronus takes the same form. Rowling has said that Hermione contains aspects of her own personality, which helps explain why readers often connect the two characters and their Patronuses.

Patronus forms are not simply a ranking of magical power. They are individualized manifestations associated with the caster, and some can change under unusual emotional circumstances. Rowling’s otter is a biographical detail about the author, while Hermione’s otter is a fictional detail within the books.