After the ten points awarded to Neville, the Gryffindor table exploded with cheers, they've now gotten more points than Slytherin, and they're winning the House cup! Harry cheered along and watched as Neville was dog piled by various Gryffindors, whil Mayumi simply watched like, well, she expected this.
"And at last," Dumbledore turned her twinkling eyes towards Mayumi, "For her excellent foresight and ability to make use of the power of fun and laughter no matter the occasion, I award Mayumi Hirutasu ten points."
All eyes turned to Mayumi, who blinked with her mouth gaping open, for once, surprised.