The harp is a lie.

[Anonymoose]

But look on the right side, between the Bard's arm and the bow. He's holding it upside-down but that is definitely a scythe blade. It extends out pretty far, though the perspective kind of messes with it. It appears to extend outward and up around his leg (since it's upside-down).

There's a pretty convincing image a few pages back that fills in the obscured parts of it - despite being speculative, it seems much more likely that what you're seeing is an elaborate halberd. Lu-Bu Style.