"You too?!" Rainie laughed. "I thought it might've only been me and the hufflepuffs who had nightmares about him and potions!"
She took a snack and stood up, smiling appreciatively at both of them while taking off her shoes, socks and school robe. "I'm gonna see if he's gonna come up now if I do what I did last time." And with that she stepped into the shallow part of the cool water while unworriedly hiking up her skirt to reveal mid-thigh tights and crouched down towards the water and held her postion.
Rainie turned her head to give the boys a large grin before she started yelling at the water the same way someone would call for a dog. "Squidy! C'mere Squidy!"