The jet passes, apparently serenely, through the formerly-empty sky above.
"Huh," says Marisa, who has been lying on her back staring up at the sky. "That's a new one. Are we finally getting a dragon?"
"You know, I really should, but I don't. I have some junk on me that might work, but I don't think it's worth you opening a door. Unless you do that all the time."
Marisa can actually call people, but not humans (they mostly aren't magic enough), and it's a really rough work in progress. She usually just drops in on people.
"See you soon!" And she flies north.
Sanae doesn't keep abreast of the local technology level, that's not her job. It's not that implausible that they can pave a (miniature) airfield. And if Marisa thinks she can get a miniature airfield enlarged, she's right.
The problem is, it's not that implausible. This is all above her pay grade, but she thinks the idea is that fake pseudoscience technology is a lot easier to research and develop here than boring real technology.
Which is why they have a fusion reactor, but she can't charge her phone.
I'm setting it up for you.
Kanako has formed a body to negotiate in person; tall, wide, and mountainous. She's not particularly lowballing the kappa engineers. This whole situation counts as a capital expenditure, and she's not a quarterly-report-chasing sort of god.
Reimu has engaged an inexplicably present Cirno in battle, for some reason. The plane is safe from crossfire, though. The people inside have a decent view.
Besides herself, Marisa can think of two good space-expanders off the top of her head, though she's sure she could scrounge up more if she has to.
Sakuya is a hobbyist, but Marisa knows she's good at it. They've got a longstanding relationship, but she'll want to be paid.
Komachi is a professional, but she's a slacker. That's fine; Marisa can finesse her.
It's unclear how compatible what they each do would be together, but Marisa thinks she can stabilize whatever mess results. She couldn't do it at all on her own, it's not an active research area for her, but she has a rough intuition built for it.
She flies to the Sanzu-no-kawa, the river separating life and death, which is north of the mountain, because she has to get Komachi physically but can send a message to Sakuya (a target she's practiced her rough message spell on already). As she flies, she composes that message.
Got an emergency! โโ(> _ <)
Help out???