She could be an adult, but a small demon?
Yes... However, this is my personal opinion but I would not want this story to turn into a lolicon story... I imagine them so well enriching their relationship over time..... It's just my wish, but I'd be quite disappointed if she didn't grow up. (●'◡'●)
And her state of mind makes me think she's a child... with her stuffed toy.
True. a bit like Niehime to Kemono no Ou.
I want to see this little sweetie demon in adulthood...(๑•ㅂ•)و✧