Chase watched as Andrew dove in. Great.. She stood for a moment, and then kicked off her shoes, hoping they would stay there until they got back. Cold water.. and not that covering of clothing, sure she wouldn't be pulled down. But it would be FREEZING. Almost like swimming in the lake at Hogwarts in the dead of winter. She took a deep breath, and then jumped into the water, diving headfirst in so as to get it over with quickly. She gasped at the freezing temperatures, and then, following Andrew's lead, she waved her wand, casting the bubble head charm on herself as well. Breathing in warmer air, that smelled oddly of the sea, she looked around the waters, and then at Andrew and Jack, struggling to keep herself from laughing.
They looked like they had giant fishbowls upturned on their heads, and somehow it kept the water out, and fresh air in. She dove under the water, so no muggles could see her with her fish bowl head, and looked around. The charm made it easier to see as well, and she glanced up at the feet of the others, her eyes landing on Andrew's before turning to look down at the bottom. Pebbly, and bare, there weren't any fish around. Nessie probably ate them all. She giggled and swam down, sitting on the bottom of the lake, looking around at the weeds and filtered sunlight.