The Einhell Fortlet (アインヘル小要塞 Ainheru Koyōsai) is a huge indoor training facility designed and constructed by Professor G. Schmidt, after becoming the Leeves II Campus's special advisor in The Legend of Heroes: Trails of Cold Steel III.
The architecture of the facility consists of an interchangeable composition through its large-scale orbal mechanism. It is used for all sorts of battle training scenarios, and weapons testing.
The moderators of the facility are G. Schmidt himself and Tita Russell, who he personally chose, being the granddaughter of Albert Russell—a genius in the studies of orbal components and once worked alongside G. Schmidt.
- It is the Leeves counterpart of the Old Schoolhouse from the Main School Campus.