User blog comment:Skeith9/Heroic Spirits Speculation/@comment-24754018-20140507193840/@comment-24754018-20140507214349

Ugh, I'll have to leave it for someone else, I can't seem to write Kusanagi in a way that isn't  ripping off Invisible Airs abilities to some extent (on one hand I accept that they might end up similar, and on the other I can't stand the idea of copying it). I'll see if there is something more original I can write.

Regarding this idea in general, maybe something about how he swapped one of his opponents swords for a useless wooden one? Or maybe how he disguised as a serving maid?

His character seems a tiny bit evil / psychopathic, though it may just be the sources I read:

"As the legend goes, Prince Yamato who was at first known as Prince Ousu had slain his elder brother. His grieving father King Keiko, fearing the evil nature of his son, sent Prince Ousu to Izumo Province (eastern Shimane Prefecture) and then to the land of Kumaso (Kumamoto Prefecture) to battle brigands and rebels." 

"Finally, Emperor Keikô asks O-usu [(His previous name)] if he did indeed talk to his brother and warn him that he should not disobey the emperor. O-usu replies that he did not fail to teach his older brother his duty. In fact, O-usu tells his father that he surprised his brother one morning and then crushed and dismembered him. Not surprisingly, Emperor Keikô is horrified by his 15-year-old son's acts and cool demeanor." 

I'll keep thinking, but I would not get my hopes up.