Saw it & loved all of it.
Enjoyed the formal and period Japanese grammar, especially the narrator at the end of each ep.
Definitely lots of cosplay sources - though you might need some VERY funky contacts ...
Reminds me of the great Philips Screw vs Allen Wrench debate.
Or ions in chemistry class.
Hmmm, shogi piece-shaped eyes:
Go for the mylar contacts for Princess Hitei:
If you cosplay Hitei hime you might need about 1 and a half tatami mats of HAIR.
With pink and green highlights:
That's a light pink fabric panel in front under the lacing, so it's actually modest.