User blog comment:Deyuaru/Research Data of "E Pluribus Unum"/@comment-151.68.77.41-20160314220829

About that "White cloth of..." I was reasoning about it and it suddenly hit me. If you translate it in japanese it becomes 白衣, hakui. The first things that comes to mind when you hear "hakui" are doctors, but especially nurses.

And since she was mentioned in Emiya's Interlude and her image had a great influence on America during the Civil war, I would guess that Nightingale is going to appear as a Caster.

https://en.wikipedia.org/wiki/Florence_Nightingale