Leto II Atreides is a central character in Frank Herbert's science fiction series, particularly in the novels "God Emperor of Dune" and "Children of Dune." He is the son of Paul Atreides, the original protagonist, and possesses extraordinary abilities due to his unique heritage and exposure to the spice melange. Leto II undergoes a transformation that grants him superhuman powers and a long lifespan, allowing him to rule as a god-like figure. As the ruler of the Imperium, Leto II enforces a strict regime to guide humanity's future, believing that his actions are necessary to prevent chaos and ensure survival. His reign is marked by a complex interplay of power, sacrifice, and the burden of foresight, as he grapples with the consequences of his choices for both himself and the universe.