Board Thread:Episode Discussion/@comment-24573226-20161003151422/@comment-24573226-20161004013121

ChishioKunrin wrote: I somehow recall them saying that they had to hurry to design and build the vault because of the Maidens thing being included in the show, so I don't think that the vault or the symbol was designed before the Maidens were conceptualized. Oh, OK. I misread that you took shots of it in Vol 1 and the vault. Doh.