"perceives things hidden beyond ordinary sight and instinctively senses places where reality, fate, and the supernatural overlap."

I would imagine for Asteria, she would instantly see something for what it is. Especially as she is a Demigod (stronger bloodline), I imagine when it comes to gifts, hers would be measurably stronger anyway.

I do have a question, are Nimue's origins really obvious with the references, or just enough mystery so it requires a little deduction.