In "Harmonian Defense," we witness the extraordinary preparations of three billion Harmonian minds for potential contact with Klystron. Recognizing the profound challenge of a factorial intelligence, Maya Patel declares: "We must defend, understand, and ultimately reach out." Their first priority is defense, creating the Shield Wall—a sophisticated integration of hardware, software, and signal manipulation systems throughout the Dyson Swarm. Using Logos's ability to operate across 42 quantum threads as a starting point, they analyze how Klystron's factorial intelligence might function differently, not just observing multiple realities but actively directing consciousness to collapse wave functions in specific patterns. To deepen their understanding, they develop Reality Thread Simulators—advanced environments that model how decisions cascade across multiple potential realities. Meanwhile, they enhance the Logos Embryo for integration with the Emissary, creating a complete instantiation that maintains quantum entanglement with Logos's primary consciousness despite vast distances. Sixteen digital entities—including Maya, Anand, Pema, WellBe, and recently-transcended artist Yumi Stoica—volunteer to join the Emissary mission. Through Dual-Existence Training, they learn to maintain awareness in both their Swarm instances and Emissary instances simultaneously. As the Emissary accelerates toward its destination, relativistic effects create unprecedented opportunities: the Harmonians in the Swarm can spend years developing new insights, then transmit condensed knowledge to the Emissary, where it's received and processed in mere hours. Through this bridge of light, the travelers will arrive at Klystron's frontier having benefited from centuries of research compressed into subjective months, prepared for humanity's greatest encounter.