Same, it’s gone over my head on each watching until I noticed it again now and wondered if there was something to it…
yonosoyfriki answered your post: I wonder, has the RGU fandom explored …: Maybe the sister school is a “backup” in case something is wrong at Ohtori or it can even be the first school they used before Ohtori
A backup is certainly plausible, I can see Akio wanting as many fail-safes as possible. I’m less sure about the ‘first school’ concept, given the vice-principal is asking about who will go and inspect the school, which makes it seem to me like it was recently built or opened, but that lends itself well to the idea of a backup, if it’s just been built.
Aye, she does. I’m looking at the page now (as I happen to have volume 1 on my shelf) and it says:
Aunt Yurika: ‘I didn’t want to tell you until it was final, but my job is taking me to Holland. Amsterdam and Hou’ou-shi are sister-cities, and there’s going to be a big hotel built there! The Japanese investors have put me in charge of the interior design.’
(page 37 of the Viz translation of volume 1)
I don’t know myself how well the canon of the manga and the anime match up, but if these wider details are supposed to be the same then that would explain why Ohtori Mk. II is in Holland of all places. And if not for the events in the prologue, Utena would have been going to Amsterdam with her aunt as well.