I'm a big fan of that squirrel, particularly in panel two. The pose intended to mirror Nanase's and I like the idea a squirrel being all ready to discuss something in a confidential manner.
And yes, the squirrel is questioning what's in that acorn in response to seeing floating Nanase. It's a shame, really. I bet that acorn was a tasty treat.
Nanase generally doesn't glow when flying later in the comic. I suppose she could if she wanted to, but she doesn't, so she doesn't. I'm not sure if I included the glow because I considered that standard for Nanase's flying, or if I wanted to provide additional contrast with the night sky. Probably a little from column A and a little from column B.