Snape is the only character to have zero changes to his wardrobe throughout the entirety of the film series. Alan Rickman also had a lot of say in his character’s outfit: “Rickman felt that he needed a lot of buttons, because, in his mind, he saw Snape buttoning up when he developed the character. He also wanted the sleeves to be tight. He realized that the whole look was essential to the character’s completeness.”