After the initial shock when coming into contact with such cold water, Ariadne felt the transformation become complete and she was thrilled at the prospect of being able to breathe underwater. She swam to catch up with the others, quite enjoying herself, oblivious to the water demon that was watching them, since she was not a very observant person to begin with. Nevertheless, even she took notice of most of her classmates' expressions when looking at the creature, so in the end Ari noticed the grindylow as well. Eeek! The girl swam faster and faster, praying the demon wouldn't follow them.