MidnightEgg
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Finished vol. 1. I'll put my guess here. Chat seems like a special creature being nurtured by Harry. Her dreams might be very important to him.
Well, they are quite important, but we're lacking a fair bit of context as to why that is.
That's the end of volume 1, and we'll finally get a true peak beyond the door. And again many thanks to the people who have picked this up, you are all truly wonderful.