if reaper then Gaius

[MoofiaBossVal]

The handle of Zenos's weapon terminates in front of the wing of the chair. What you have highlighted is a pipe-like protrusion that goes down behind the wing of the chair. There is no blade on it. All you got is knob (which looks a hell of a lot like a sword pommel) there behind the pipe-like protrusion from the chair's wing and a handle that looks wrapped in red cloth.

I was thinking that the "knob" was actually a counterweight on the staff, but in that image yeah it seems clear that the staff just ends.

Seems that whatever implement is affixed to Zenos' staff - be it a hammer head or a scythe blade - is resting on the ground at his feet.