A Zounose book I haven't read, it's been a while.
I'll re read it several times for sure, but for the first go it seems Reimu is seen as the shrine maiden and herself as one, where someone like Sanae's self and role as shrine maiden can be seen separately. Yukari takes her own way (as always) to see what Reimu will do if she isn't burdened by the role that has taken over her self perceived by others. But then she goes and does her normal thing as always.
Ironically no one was eaten.