I know I'm late to the party here but, I've gotta vent here. Holy crap I can't stand Nanoka. Feels like ever since we learned the truth of her past what little bit of interesting character she had dropped off the face of the planet.
She's been nothing but, a background mob character and excuse for exposition dumping this entire time. She's like budget Kagome/Akane at home filled with nothing but, this puppy crush even in the midst of super dark and serious stuff going on.
The time travel portion doesn't mean anything either as she's basically modern day illiterate for some reason. Needs some boy at school who knows everything because he wears glasses to find out anything. Then she sits on said knowledge because, oh no her crush might not like her. At this point I feel like if she were removed from the story barely anything would change.