This is the Harmony Weapon from Library of Ruina, made into a 3D model for things like VRChat. It requires Poiyomi 8.1 to have the shaders work properly but that's about it. This "Banjo" is from Library of Ruina, a Project Moon game. I simply remade the "banjo" here into a 3D model and tried my hardest to get it to replicate some of the attacks found within the game.