Professor Snape is the potions teacher at Hogwarts school of witchcraft and wizardry. He is also head of Slytherin House. The bitter potions master, presided over the castle dungeons. Strict and cruel, He possessed a deep understanding of potion making and the dark arts. To his cold eyes, the castle was a prison for him to atone for his dark past, where he had to endure foolish children constantly. Only tending to the bubbling cauldrons soothed his hatred and regret. : 0.5