Part of the Heindree Series, the latest all-purpose Mobile Suits produced by Grassley Defence Systems based on the Hein OS the Hendree Sturm is optimized for active combat. It is a 4th generation mobile suit and the new flagship model of Grassley having been significantly upgraded based on data and engineering expertise gathered from the production of its predecessor, the Heingra.
In A.S 106 at least three Heidree Sturm equipped with Greave unit deployed as escort unit for Ridrick Krueger's CEK-043LBK Beguir-Beu Torche on Earth, to hunt down several XGF-01 Gundam Lfrith Pre-Production Model. Later in A.S 122, two Heidree Sturms were deployed alongside Dilanza Sols to suppress a Earthian–Spacian inequality protest.