>>49883181
In the extra stage she tests you before you go to meet resident schizophrenic Watari Nina, in the endings Sanae is sent by Kanako to fetch her; Kanako is Yuiman's friend from a long time ago. Likely that they'll work together.
>>49883201
Take her on big trips to see new places and try new things! She'd probably be really happy to hang out in nature and do camping and stuff. You'd have to be gentle and take things slow though since she's just been unbrainwashed and her brain got fried
>>49883306
I think she's someone whose wardrobe consists of 90% black