Honestly when I see that picture of Hyadelyn she reminds me of Shiva, Altana, and Cloud of Darkness.

That picture of Zodiark reminds me of Ifrit, Maduin, and Sephirot.

They're both probably kinda bad in their own ways. They're also just following the established, "Women monsters look like hot women and gentle with thigh highs and things." Male monsters are ugly, buff, horned, and fiendish looking.