ok, part of the problem is that the centre of balance is off - the figure looks off-kilter, like they're going to fall over, so you'll want to nudge the stuff you've drawn in red over to the right, until the centre of the crotch is pretty much in line with the handle of the sword.
the second thing is that Mocha is right - the blade of the sword is not in the right perspective - if you draw the blade shorter, maybe in line with the character's mouth or chin, I reckon it would look a bit better. The redline perspective on the arm is actually pretty well drawn, so I don't think that's the issue.