He carries himself like Cal. That's enough to make her more than a little bit wary, but she supposes she has little choice but to go with this man, whomsoever he is, and try to get to safety. Which Rose is entirely certain isn't this beachfront, unlike any beachfront she'd seen or tried to imagine. But she's still a wriggling squid at that point and the bulk of her attention is drawn to that seemingly impossible thing. Although he's acting as it's entirely normal?

She tries to smile back, but she's sure it's as shaky as she feels with the weight of her wet clothes dragging her down. She's not getting rid of Cal's waistcoat, not while the diamond is in its pocket, but she'll be more than happy to be rid of the dress for some warm clothes. But his words prompt her to ask "So, this is...commonplace? Humans turning into squids in the ocean? How--how utterly terrible and strange. How does one get used to such a notion?"