Yeah, her outfit is meant to be a combo nazi + imperial japan thing because of the setting of the Imperial Holy Grail War. It isn't the shogun armor she would have been summoned in, its an outfit she put on during her Grail War, and her Grail War took place during the closing months of World War 2 and involved the German and Japanese militaries. It's pretty explicit in that aspect.
For the record, that story also involves Hitler being shot and GudaGuda 3, which was a loose adaptation of that story, went out of its way to not really touch on any of that stuff, so I'd hardly say anyone at type-moon is a Nazi sympathizer or historical revisionist, it's more just a function of playing fast and loose with iconography.
OTOH the bar in carnival phantasm being named after https://en.wikipedia.org/wiki/Ahnenerbe is just weird.
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For the record, that story also involves Hitler being shot and GudaGuda 3, which was a loose adaptation of that story, went out of its way to not really touch on any of that stuff, so I'd hardly say anyone at type-moon is a Nazi sympathizer or historical revisionist, it's more just a function of playing fast and loose with iconography.
OTOH the bar in carnival phantasm being named after https://en.wikipedia.org/wiki/Ahnenerbe is just weird.