Istid doesn't answer Joan's question, entirely because she is already in a full sprint towards the river and too gleeful to pay attention to anything else right now.

"Out of the way!" Istid says, almost singing in happiness, before leaping into the water with the grace of an experienced human. Water rushes past the hidden gills on her neck, and she sighs in relief. The river carries her along its path, and she allows it to without any struggle.

Already, she can feel her skin rehydrating. Yep, Istid is staying in here for a while.