Josh Emerson serves as a crew member aboard the Aratrum alongside Martin Lazzari. He assists in monitoring Godzilla Earth's status after the destruction of Mechagodzilla City. During their observations, Josh questions if Godzilla is dead, and Martin confirms the creature is only dormant. Josh then inquires about Godzilla's origins and purpose. Martin discusses theories that Godzilla arose from humanity's environmental disruption, suggesting an alternative view that humanity's existence might have served the purpose of bringing forth Godzilla as the ultimate lifeform. Josh notes such a perspective would be unacceptable to Captain Harou Sakaki, and Martin acknowledges his own reluctance as a human to accept the idea. Josh's role involves performing technical operations, including monitoring systems and communicating observations about Godzilla's condition and activities.