On the one hand:
For a Superheroine bestie for Diana, Id rather see a version of the Helena Kosmatos FURY character adapted to occupy the best friend turned frenemy role that Barbara Minerva/Cheetah has been shoehorned into.
Keeps the mythological connection and the “sought power but got it with harsh consequences” because of the bestial tinges of her “gift”....


If you’re going with Wonder Woman’s version of WORLDS FINEST, Huntress is an obvious choice. Added bonus that Diana is named for the Goddess of the Hunt. Also gotta love the Silver Age connection that had Classic Huntress as a backup feature in WW’s book!