The moment I saw the entirety of the ground team's party members, I knew the liabilities would be Ditzen and Mea, with Ditzen being the first to realize my suspicion. Lo, and behold: Ditzen did his job properly, though he spent time wasting his energy worrying (which would surely eventually lead to his meeting my expectations), and it was Mea who proved her stupidity.
If she couldn't handle a bunch of buildings--that are lesser in grandeur than where she lives--why did she bother to volunteer? Did she think'd be a field trip? Did she think there was no chance of her screwing everything up? Perhaps it's the more likely case: she probably thought Taiki's golems would clean up all her spilled milk for her; that's how the immature usually are.
This story has its appeal, but it'd be nice if the author didn't choose this oh-so-predictable-and-inane development.