Produced at the end of the Calamity War, the Grimgerde is one of the mobile suit models that used the Valkyrja Frame. The Valkyrja frame was easy to use, lightweight, and compared to the other Calamity War era machines, its design was simple with minimal energy loss. In terms of specifications, the Valkyrja Frame had the capabilities to be the main combat machine on the battlefield. However, as it was developed at around the same time as the Gundam Frame, not many people were aware of its existence. Based on remaining data from the Calamity War era, the overall production number for Valkyrja Frame-based mobile suits was small, with a theory that less than 10 units were produced. There was also not much information regarding their combat record.