Good find. Here's the latest archive.org scrape of her Carrd site which is currently down.
AstreRxse
web.archive.org
Searching for the email address finds this tweet:
Which associates the address with this account which mostly seems to just retweet stuff but I guess did commissions at some point and claims to be from Japan:
https://twitter.com/littleautumn5
Yeah, she seems to have deleted those tweets right after I posted them.
Yet another weird thing about this whole thing. If she wanted to be anonymous and not associated with her AmeliaDxrk account, why didn't she just start a new account?