Walter Shreeve, known by his villainous alias Shriek, is a prominent character in the animated series Batman Beyond. As a former sound engineer, Shreeve developed advanced sound technology capable of manipulating and controlling sound waves. This technology led him down a path of crime and conflict with the new Batman, Terry McGinnis. Shriek's suit enhances his auditory abilities, allowing him to create destructive sonic attacks. His character explores themes of ambition and the impact of unchecked technological advancement, making him a formidable adversary in the futuristic Gotham City setting.