Severus Snape is a fictional character in J.K. Rowling 's Harry Potter series. An exceptionally skilful wizard, his coldly sarcastic and controlled exterior conceals deep emotions and anguish. A Professor at Hogwarts School of Witchcraft and Wizardry, Snape is hostile to the series ' protagonist, Harry, the moment he sets foot in Snape 's classroom; this hostility is rooted in Harry 's resemblance to Harry 's father James, who bullied and harassed Snape during their time at Hogwarts. Though philosophically attracted to the Dark Arts and Lord Voldemort 's ideology of wizard supremacy, Snape 's love for Muggle - born Lily Evans, Harry 's mother, eventually compels him to defect from the Death Eaters. Snape becomes a double - agent on behalf of Albus Dumbledore and the Order of the Phoenix, and protects Harry throughout the series.
who is snape in relation to harry potter
Professor at Hogwarts School of Witchcraft and Wizardry