Diana swims back with a girl

Diana grabbed her around the waist and launched them toward the surface.  For a terrifying second, she could not find the shape of the island, and then the mists parted.  She kicked forward, wrapping the girl awkwardly against her chest with one arm, fingers questing for a pulse with the other.  There-- beneath the jaw, thready, indistinct, but there.  Though the girl wasn’t breathing, her heart still beat
...
She swam for shore.  As she passed through the boundary with the girl clutched to her body, the mists dissolved and the rain abated.  Warmth flooded her body.  The calm water felt oddly lifeless after the thrashing from the sea, but Diana wasn’t about to complain.