Severus Snape is a fictional character from the Harry Potter series, created by author J.K. Rowling. He serves as the Potions Master at Hogwarts School of Witchcraft and Wizardry and later becomes the Defense Against the Dark Arts teacher. Snape is known for his complex personality, often portrayed as a strict and enigmatic figure. Throughout the series, Snape's loyalties and motivations are central to the plot. He has a deep connection to Lily Potter, the mother of the protagonist, Harry Potter. His character evolves, revealing layers of bravery and sacrifice, making him one of the most intriguing figures in the series.