Carol sticks close to Loki and Mera, realizing her attempt at staying quiet was futile as Enis voiced it. The inability to see what was in the water is a huge concern, though. Walkers she could handle easily enough, but whatever was in here was an unknown entity, and that was just as dangerous as the leak.

As they walk, a sense of calm falls over her. She wants to keep going forward and find the source of this calmness. It takes Enis stopping them and pointing out she can hear whatever is with them for Carol to realize that she's hearing a song.

And then Enis is pulled under.

Carol is immediately in fight mode, knife up and ready, eyes searching for the assailant as she stands still. "What was that?"