Professor Snape is the best villain for Harry Potter. When Harry arrives at Hogwarts, Snape appears to hate him vehemently. Throughout the story he appears to betray Harry several times and even kills his dear Prof. Dumbledore. However, there is always something behind Snape that makes him seem like a villain who can be bad, but yet is on Harry’s side.
Snape was teased by Harry’s dad, James. He hated James, however he loved Lilly Potter. This love made him desire to protect Harry as he grew up. He had to be a bad guy to take care of Harry because Voldemort was very intelligent and would have seen through him if he had not been willing to kill for him. Snape knew where to draw the line and where his loyalties lied however, and would not push beyond that line.
Professor Snape was good for Harry because he was once a Death Eater and Voldemort trusted him. He did things to show Voldemort that he was right to trust him. By doing this he could stay close to Harry, train him, and protect him. He was a villain who in the end turned out to be the good guy. Even when he was a villain it was slightly apparent that he did care about Harry and would in the end protect him at any cost.