User blog comment:IamJakuhoRaikoben/Chapter 384: Attack of the Stars, Review./@comment-24909526-20140516094918/@comment-7418318-20140516104245

She didn't have the key, but she had Loke himself and was connecting with him. In the manga Loke even said that she was merging with the Celestial energies and would disappear with him if she didn't stop.

With Aquarius she would have nothing to connect to her.

I'm also confident that Lucy will get Aquarius back somehow, but I also think it won't be that easy.