User blog comment:IamJakuhoRaikoben/Chapter 271: Lucy vs. Flare, Review./@comment-108.38.11.56-20120218151209/@comment-3290324-20120218165459

Lucy has almost always summoned her in water, though what I'm trying to say is that the water is simply a preference on Aquarius's part, not a requirement. Also I'm not saying the water being dangerous would be a problem for Aquarius, I'm saying that it would be a problem for Lucy, and that if Lucy could summon Aquarius when water was just nearby then why would she run the risk of touching it?