You have an issue with the mesh, a couple of stray verts.

one on either side of the sword (left image), see how the orange line passes the vert next to it and continues to the next vert?
if you merge each vert with the one next to it (right image) this should solve your problem.

select everything and unwrap again, everything is a lovely shade of blue. A slight greeny blueish on the tip of the sword but nothing to worry about.