I like it. At first I thought it was Natasia though (I know a Natassia "Tassia", pronounced like
Natasha /
Tasha) but then I realised it was
Nastasia. I don't think it's too similar to Nasty-
Anastasia is more like anasthaesia than
Nastasia is like nasty. The "Nas" doesn't even sound the same (at least how I'm saying it). Stasia could be a nickname. Or maybe
Asia? I don't think it looks like a typo, because it starts specifically at the N. Anistasia or Annastasia would look like typos IMO, but not
Nastasia.