He is the only human who is resistant to George's memory-erasing thermoblast. Towards the end of the series, it is revealed much to the surprise of Janet, Tyler is only thirty-two years old. Tyler once reveals to George and Arnie that at five years old, he was sent to boarding school and was bullied repeatedly for ten years. Tyler often refers to George as "Master", and occasionally calls Janet "Mistress". Following Cassie's birth, Janet often ropes Tyler in as an impromptu babysitter. Tyler's surname is never revealed.