"Mayumi, aren't you going to the Halloween Feast?" Ron asked.
Said girl spared her a wary side along glance, and looked back down to her phone.
"No." She stated, "And by the time you get back, I expect you to have fought a troll and made up to Hermione."
About half an hour later, just as harry was taking a flying leap onto a troll's back, he yelled.
"MAYUMI!"