I think it's very apparent that people, probably the guys Nyxmay saved that the elder worried about returned to kill/capture the fairies, and then when Nyxmay started killing to defend them either found she just really enjoyed it, or snapped.So, what do you think that happened in the forest where Nyxmay used to live? What happened to the fairies and the forest itself?
I believe (or want to believe) that it was not her fault, that someone else destroyed everything and her sadistic side awoke when she killed the invaders.
Also, since she looked a lot different in the past, how do you think it happened? I mean the look change, does it happen naturally when someone changes completely, she changed herself to not remember constantly how she used to be, or did she become corrupted by magic, and thus made her cause the destruction of her own forest?
This last update really got me, I really hope someone sponsors it at the end of month.
However, it's possible that there's some twist or curveball there, like Nyxmay killed them herself for some reason- like a witch fattening children up to eat, she gathers up the sweetest, most innocent lives to mercilessly torture and kill for the ultimate high.
As for how her appearance changed, my assumption is just Homaspernia's influence. Something about that place just hands out black wings