User blog comment:IamJakuhoRaikoben/Chapter 457: Naked Battle, Review./@comment-24442815-20151020135200/@comment-7418318-20151020140317

The remnants of Aquarius' key she kept hidden in her hand the entire time.

Where she got/had Aries key wasn't shown, but I assume she grabbed her key-case when she ran out of her house.