[quote=Tatsua Aiisen]
He uses the dimensional refraction phenomenon to sublimate phantom mirages of himself, relating to the way that countless swordsmen that existed during that time period all had their heroic deeds attributed to Sasaki Kojiro, who was inherently a fictional existence. It is essentially what would happen if you attempted to replicate the phenomenon called Sasaki Kojiro using the all-powerful wish-granting ability of the Holy Grail.
[/quote]

Wait, so you're saying this is just an explanation for Kojiro being here in the first place? Because if it is, that's cool; you didn't even need a NP for that. Nasuverse already has fictional characters be real; you don't need a NP to justify Sasaki Kojiro, who in the first place was probably real, to be here.