Gundam Astraea TYPE-X Finsternis is a custom mobile suit featured in the side stories of Kidou Senshi Gundam 00. As an experimental Gundam unit, it serves as a prototype for future celestial Gundam models. The TYPE-X Finsternis is known for its advanced weaponry and stealth capabilities, making it a formidable force on the battlefield. Although not piloted by a central protagonist, the mobile suit plays a key role in the evolution of Gundam technologies within the series' expanded universe.