Upon further analysis, Severus Snape, portrayed in the Harry Potter films by the late Alan Rickman, is clearly an unpleasant and often feared individual, but as we later discover in Harry Potter and the Deathly Hallows: Part 2, his character is relatively misconstrued throughout the series, thanks to focusing on Harry Potter’s viewpoint.
Throughout the preceding films and original novels, however, there are blink-and-you-miss-it hints at Professor Snape’s true and admirable intentions.