Nemona is definitely an interesting character and has very possible yandere tendencies. I like her character though, she's really fun and I love her personality. I never thought of her being autistic coded, but now that I think about it, I think you're onto something here.

I am also on the autism spectrum and have been known to get obsessed with things to the point of burn out sometimes. I wish I knew how to explain it better beside being kind of like the Little Match Stick girl who burns all her matches out in one sitting because she longs for that feeling of warmth, family, and belonging...and maybe part of me wants to be absorbed into whatever fictional world I'm fixated on at the time. That's the best way I can explain it. I kind of relate to Nemona a little bit now...not the yandere tendencies but I relate to her passion for her hobbies and wanting to be the best she can be at them if that makes sense.