Let's look at the red parts in these two images:
So, is "risou" referred to the city or to the inhabitants?
(The ideal city or the ideal inhabitants of the city?)
Is "nazo no" referred to Frau X or to her martial art? (Frau X who uses a mysterious panzer kunst [different from the usual one we have seen in 20 years of serialization...] or The mysterious panzer kunster, Frau X?)