>>536267092
「舞台装置の魔女」(Butai souchi no majo)
「舞台」(butai) "stage"
「装置」(souchi) "device," "machinery," "apparatus."
Right now, the PM wiki is calling it "Stage machinery witch."
Maybe this is the best name for it?
Iirc the PM wiki used to call it "Stage Construction Witch."
Though, clearly it's not just Stage.