Severus Snape

Professor Severus Snape is an anti-hero from the Harry Potter series. His loyalty was debatable, but he was finally revealed to be on Dumbledore's side at the end of Deathly Hallows. He is teacher at Hogwarts teaching alchemy and later on classes on protection from the dark arts.

Throught out most the the Harry Potter books and by extension the movies Professor Snape is used as a red-herring acting heavily suspicious and in the deep of the less wholesome parts of the plot. Towards the end he is even shown to be a member of the evil sorcerers known as Death Eaters. However at the very end of the epic Snape reveals himself to be a sort of double agent trying to infiltrate and undermined the evil  organization. Though his role is fabricated his personality is not and he has a great dislike of Harry, feeling he is unfairly gifted with magic and worse still, wastes his natural prone potential on trivialities.

Snape appears in Castaras as a villian, has people may think that Snape is dead, however,  Baboon reserects him from the dead, using the stone which Harry Potter had droped when in confrontation with Voldemort in the woods.

Draco Malfoy also appears as a goodie not a villian in Castaras. He is seen as a dumb kid.

As of Half-Blood Prince, Snape was the only wizard to teach Defense Against the Dark Arts, and live to tell the tale.