Hikago asks what the difference is between kimono and yukata. Obviously he could've researched that, but in the spirit of sharing the excitement of being a shameless weaboo, here's what I know from my limited experience... And if it makes snobs like WAH to squirm, so much for the better.

The main difference is, kimono is a formal garment, whereas yukata is an everyday clothing piece. From there, all the fun things flow that you read on the Net: a hereditary kimono, thread reuse, etc.

Kimono is almost invariably made from silk, whereas yukata... hmm... I suspect it's cotton these days.

One thing weaboos often underappreciate about kimono is how warm it is, in particular since you must wear warm undergarment with it. The white band (as demonstrated by my online friend Katie to a good effect) is the indicator of kimono. So, wearing it in the summer is pure suicide. Honestly, I'm afraid for the health of anyone serving a tea ceremony when it's warm. Yukata does not have kimono's code attached, and can be worn haphazardly.

So, what is Hikago's Shana wearing? Good question. I cannot tell without touching, honestly. I would say, the artist wanted to depict an archaic kimono, judging by the size of sleeves. See, the thing is, these days if you fight, you wear combat fatigues. This development displaced kimono into the formal area — except for anime.