User blog comment:BlackWizardZeref/Fairy Tail Chapter 384: Attack of the Celestials Review/@comment-7418318-20140516225538

Aquarius didn't really sacrifice herself. Even without the key she'll be living more or less happily in the Celestial Spirit World. It's "just" that she can no longer be summoned by any Mages and thus won't be able to ever see Lucy again, unless Lucy's invited for another one day/three month party or the key is restored.

I liked how Aquarius was determined to hate Lucy for the rest of her life, but just couldn't avoid starting to care for her against her will.