I always gets C's on te first battle, but when I watch on a walkthrough the guy always gets S's. I tried to do the exact same thing with combos like three swords slashes then a demon fang and also the down a flurry of upways slashes then a demon fang. I do those and yet I never seem to get to an S level. Can anyone give me any tips or info on how to do this. I want to enjoy this game to the fullest. Thanks!