Definitely a Knockout.
Seen from the 1st issue, Kay makes her actual costumed persona as Knockout. This issue seems to give out some hints about this sexy head; when she stole the Spear of Lono she spoke of how the "old gods" were over-rated it was hinted that she was had to be a New God. She and Superboy seem to be evenly matched in strength....but all of that was to get his attention (Superboy and Knockout sitting in a tree, K-I-S-S-I-N-G.). Sometimes I wonder what it would have been like for Superboy to have Knockout to be his girlfriend.
This issue seem great if you're looking for sexy villainess, and a good guy/bad gal romance.