This is smooth, I never got a chance to see it until now. I like it.
I think if you're going to have him run like that make him lean more into it and really put some power behind each stride, like sprinting. If he's going to stay at that pace think of have him straightening up and sheathing the swords. Just suggestions but that position looks really awkward for the speed at which he's running.
It looks like he's hopping along XD
The Character Design looks nice, but when Animated, he looks as though he's repeatedly running the Hilts of his Swords rather painfully into his Backside...
good work here