Well, she's western and from centuries past. A place like gensokyo is going to be brimming with new stuff for her. Could be a pretty good reason why she wanted to move there.
And yet more proof that you can do anything with Touhou fanon.
Stuff from the outside world is always trickling into gensoukyo, so a drone winding up there isn't out of the question.
VwshThey feel like a lady's holiday.Indeed, it is.Just taking it easy, not causing any great incidents...VvvwwnnnnSuch tranquil days as this are also nice now and then.This is a most elegant teatime, Sakuya.Vwsh