You know, for a little bit, I was wondering whether Nora had used a similar memory removal on Yato to make him who he is today. But then she revealed that Hiyori’s memory loss was continuous, so there’s no chance that happened to Yato. It was a stretch anyway, because then there would have to be a reason she didn’t give him the memory back since she seems to want him to have it.
I wonder how useful Hiyori will be in the final battle. The last scene in the episode made it looked like she tagged along in her spirit form and the preview seems to confirm that. If she’s still without her memories, I can’t imagine she would be able to do all that much. You know, other than become a hostage Rabo can use to draw out Yato’s old self…