A yōkai from Nurarihyon no Mago who acts as a "String Assassin" or "Stringer of Joshu," often taking on enemies with specialized strings, and was historically a human criminal.
It is likely that this is a typographical error, a highly obscure username, or a personalized OC (Original Character) created within a specific fan community. yokinashi_bladze
However, based on the components of the name, here is an analysis of what it might refer to: A yōkai from Nurarihyon no Mago who acts