Mayu returned that calm smile. They haven't exchanged names, but he noticed the Sorting Hat solve that issue. A talking hat wasn't much stranger than anything else they've encountered.

Mayu Nozaki definitely came before Seth Rim in alphabetical order. He casually walked up to the hat when his name was called.

"Hey, don't fall asleep here!" the hat exclaimed. It took some time for Mayu to be sorted into Ravenclaw. His housemates did not look pleased.