Eirin's desperation has upgraded from 'impersonating her student' to 'impersonating random cats'.
It's pretty clear at this point Eirin's the obligatory Old Maid In Denial in Noizu's gensokyo.
I would like to know the source of that? I seen only the translate work here on danbooru, but I know that not everything has been translated. And to me she seems to give off more of an I been around the block before the block even exist kind of vibe.