The storm-wreathed gas giant Yhiron I serves as a major refueling, shipyard, and repair hub for large vessels entering and leaving Atheri-Doxseri Prime that cannot be properly serviced near Penumbra Station. For centuries, a floating settlement known as Port Yhiron has occupied the uppermost cloud layers of Yhiron I, taking advantage of the planet's breathable atmosphere, abundant harvestable gases, and Earth-like gravity.