User blog comment:IamJakuhoRaikoben/Chapter 291: Naval Battle, Review./@comment-4223231-20120712225043

Poor useless Lucy without her keys. Why didn't she at least bring that whip?

And after this, we can say for sure: Mermaid Heel = Kagura (and a bit of Millianna) and Quatro Cerberus = Bacchus. The rest is just for getting beat so Mashima can freely adjust the ranking.