Well, at this point, it would be pretty innovative of KOG to come up with any more weapon ideas that haven't been used yet, if that's the case for Ley. Quite honestly, I don't see her changing weapons. Perhaps it is the only thing that's iconic of her, and it will change shape in accordance to her job.
Much like how Dio's emblem changed from the Stygian sign to the Drakar sign, as indicated by the ST icons.
Pinkie Pool's archnemesis: Oatmeal.