Tom Natsworthy is a fictional character from the Mortal Engines series, created by Philip Reeve. He is a young apprentice historian living in a post-apocalyptic world where cities move on wheels and consume each other for resources. Tom's character is known for his intelligence, curiosity, and moral compass, which often leads him to question the ethics of his society's practices. Throughout the series, Tom embarks on various adventures, often alongside Hester Shaw, a fierce and determined girl with a troubled past. Together, they navigate the dangers of their world, confronting powerful enemies and uncovering secrets that challenge their understanding of history and survival.