The Patronus charm has a crucial role across the Harry Potter franchise. The Patronus is used as a defense against Dementors and acts as a guardian to the witch or wizard who summons it. When successfully cast, a fully formed Patronus will appear in the form of a silver animal. Each animal is unique to the witch or wizard who conjures it, which means that the animal often has a personalized meaning to the conjurer. For example, Harry’s stag Patronus demonstrates his spiritual connection with his father. A Patronus can significantly reflect its conjurer’s personality. It’s also possible for strong emotions to transform the shape of a Patronus. For example, Nymphadora Tonks’ Patronus transformed into a wolf because of her love for Remus Lupin, which likely also explains Lily Potter’s doe Patronus. Each Patronus is incredibly unique and can reveal a lot about a character.