Athena is human, but I guess it is possible that Kenjiro Hata could throw in a huge plot twist in the future that says otherwise.
I see. Thanks for the asnwer. It gave me a huge puzzle to think of her species, since when I read King Midas's article. It stated that King Midas has a daughter and I think it might possible her. Yet when I read Athena Tennousu's biodata, it didn't write any of her personal information such as age and family background.