[Neptune had gone to help others the best that she could. She probably one of the best of the soldiers for this particular environment, given that it was her element and she was a strong swimmer.
She was making the rounds around the dome when she finally made her away back over where she had left Uranus. And of course she makes it just in time to see that Uranus was struggling. She swam right over, lacing an arm around Uranus to try and keep her up]