Snape

Professor Severus Snape is a complex and pivotal character in the Harry Potter series, known for his role as the Potions Master and Head of Slytherin House at Hogwarts, his deep-seated animosity towards Harry Potter, and his secret life as a double agent for Albus Dumbledore. His motivations stem from his unrequited love for Lily Evans, Harry's mother, which led him to defect from the Death Eaters and protect Harry from Lord Voldemort. Despite his cruel and antagonistic behavior towards Harry, Snape's true loyalty and bravery are revealed after his death, solidifying his status as a tragic hero.