>What do we know about Sanae? In particular, do we know what she has done to warrant Nue, of all people, to call her 'weird'?
Aside from mixed rumors, all you know for sure is that she's the shine maiden of the Moriya Shrine, she apparently came from the outside world, and she was one of three girls who went with you to Makai when you were rescuing Byakuren. You do know why Nue deems her weird, that being Sanae's insistence that Nue is an alien from a distant planet, and had the tengu take a picture of them to commemorate the occasion of meeting such an alien. Which, of course, Nue isn't.
>Have we encountered Sanae before? What did we think of them?
You see her around the Human Village from time to time, but the only time you
really saw her was when she was doing danmaku against you in the Palanquin Ship back when you were rescuing Byakuren. You figure she means well, but could work on her skills with listening to others a bit.