It's hard to maintain focus. Part of her is still going over Isabelle's word - a translator geist is sitting on her knee, spooling away an endless flow of words in the various TC languages, pouncing when it sees one that might work and bringing it up to her delightedly. Hubuh: 忽布, a type of hops used in fermentation, which produces alcohol, which is the human intoxicant equivalent to quantum equations. Implication: The stranger is stating she is drunk! She looks at it with an expression of gentle pity. You're reaching, little guy. But still it brightens and runs in bushy-tailed circles around on her knee when she pays it the attention; attention is a valuable commodity to these tiny entities of the digital realm. 

Her thoughts stir into wakefulness as the hidden world opens up, but not because it is a matter of spirits and gods. Even elder spirits and gods don't hold a commanding place in her head. The spirits are the spirits and the gods are the gods, the galaxy is full of wonders and be she on windswept plains or palatial heights, she is used to being a tiny and insignificant part of that. Some geists rush away from her in a panic as they head into the darkened interior, but new ones swarm in, curious to see the secrets of the forgotten world. She can feel the silhouettes of two Ancestors coalesce behind her, grey-robed shadows with competing symbols for faces. 

#$#: You should pay full attention. This contains secrets from our time. Weapons from our wars.
(o): make the human girl show me her feet

The distraction isn't welcome. What she's actually thinking about is the new terrain element and the effect it might have on battlefield strategy. How thick are those doors? How quickly can they be opened and closed? Would this false scenery be a good place to hide concealed missile batteries or would the sensory interference of the landscape block the needed target locks? What would be a quick way to scout for these, so that she could avoid ambush herself? Would Mirror take the landscape into account or fly above it again, ceding the earth to her?

But no, she's been interrupted. It's not always bad luck to ignore an Ancestor, but she's in their house and their spirits are all awake, so it's best not to risk it. She turns back to Isabelle and starts signing - slowly and clearly - <Please take off your shoes.> She smiles a little awkwardly, and mimes the gesture on her own feet in case she didn't get the point across. If neither of these landed she wearily turned to the translator geist, who joyfully took form as a holographic keyboard, in which she typed 请脱鞋. She smiled encouragingly and gave a thumbs up as a sign of respect.