Katharon's Union Realdo Orbit Packages are painted in the organization's signature blue color scheme, but their weaponry remain unchanged. Some of Katharon's units have unique modifications, such as enhanced OS that improved their performance. The Katharon's Union Realdo Orbit Packages displayed excellent mobility, but are no match for the GN Drive Tau-powered mobile suits of the Earth Sphere Federation Forces and the A-Laws due to inferior offensive power. Despite being outdated, the Union Realdo Orbit Package is still operated by the ESF Forces in AD 2314.
Katharon deployed the Realdo Orbit Package as one of its primary mobile suits in space. Three of Katharon's units were deployed with a Virginia-class cruiser in an operation to rescue the organization's captured members from the space colony Proud, where they were forced into hard labor under high gravity condition. However, the three Realdo Orbit Packages and the cruiser were destroyed by the A-Laws' GNX-704T Ahead and two GNX-609T GN-XIIIs. Later, Katharon's Realdo Orbit Packages were deployed with other mobile suits in an attempt to destroy the first Memento Mori.