Suggested by Sonic Sienna Khan is a talented hand to hand fighter who is quite quick and resourceful. She should be able to hold her own for a bit but the main problem here is that Lucina is just more powerful. Sienna is quick but when Lucina is launching massive shockwaves and other powerful strikes there is not much that Sienna will be able to do about that. She would need a boost to her overall fighting potential in order to match Lucina and I don’t see that happening here. Lucina wins.