Nancy kind of started to like the girl. She obviously wasn't one of those whiny-types since she also laughed at her wet clothes. "I'm still really sorry." She chuckled.

Feeling pride rise inside her at Miranda's last sentence she took another deep breath, spoke the incantation and watched the balloon float in front of her.
Okay, don't lose concentration again. She encouraged herself as she moved her wand so that the water balloon was no exactly positioned over Miranda's head. Calm down. She started to count inside her head.

Miranda could be happy that she wasn't in Ravenclaw. It would have reminded her too much of Nick and she probably would have just let the balloon fall over her head. The thought of Nick made her wand hand shake a bit but she managed to steady it before she could break the spell. After ten seconds she slowly brought down the balloon and put it back onto the desk.
Her blue eyes kept staring at the balloon for a few moments and then focused on Miranda. She had really done it. "Phew. Now it's your turn." She really hoped this would work out just as well.