And moreover, this shows Reimu's great skill! She believes its for thr best that no youkai should be in the village...yet...
Miyoi introduced herself as the post girl of Geidontei, so she expected her to be human...yet...using her intuition...she deduced miyoi was a youkai! And immediately restrained her.
This is why we love Reimu
...and how come this is the second banquet where Miyoi shows up yet nobody knows of her?! Like she randomly shows up there, refills suika's plate (y'know what i mean), yet nobody really..asked who she was..or...lmfao what
Welp suika knew already tho, after all miyoi was refilling her with sake