"Hey! " Dean reached to try to knock her wand arm aside. "Look, we can tell someone. Uh - Professor Weasley?" Usually Dean would tell Hagrid. . . but that wasn't exactly an option. Maybe that's why the squid was up in arms. Hagrid had been fond of it, maybe it was lonely now?
Or maybe it just wanted to drag pretty girls in. Dean had no idea. It hadn't tried to grab HIM after all.
The squid vanished under the water. Dean didn't think it was really much worse for the wear, but he'd best telling someone, even if Daphne didn't want to, since it might be nursing a few wounds. Some of those hexes looked like they landed. "Well you don't look hurt, anyway," he answered.
She actually looked very, very wet. And her clothes were more or less plastered against her. And he could see through to the pink hint of skin beneath, through the white shirt, anyway. Dean was just as soaked, but he wasn't in white, and wasn't a girl. The view likely wasn't that impressive - just wet clothes.
Dean averted his eyes upward to Daphne's face, a little too late, probably. "Do you need help back in then, or anything? Or I could get Madame Pomfrey if you need?"