I think it means she comes from a High Elf background, as much as Ennas and Lyria come from a Blood Elf one, both of them also use VE voice lines and models, and Ennas the green version of the same draconic eye color. She is a “high elf” in the same way they are “blood elves”
Yeah, the context of the question was something akin “where the HE wayfarers retconned out of Telogrus?” and the response was that it wasn’t meant to be read as that and that Everdawn is a high elf herself. So the idea that high elves have joined the Void Elves and ones such as Everdawn have become named NPC’s is 100% canon.