Helena Ravenclaw and Ian vanished together from Ravenclaw's Common Room.
That was also why Ian had dared to gulp down the Draught of Living Death. It was not merely his soul that could enter the Misty Illusion, but also his physical body from the material world, capable of carrying all sorts of things.
In the fireplace, the flames flickered gently, making warm, soft crackling sounds—the only sound in the tranquil space. The Young Wizards snored away in their dormitories, and Ravenclaw's Common Room returned to silence—impossible miracles always happened quietly, alongside countless ordinary things.
At this very moment, Professor Flitwick was in his bedroom studying the finer details of the Patronus Charm. Ravenclaw curiosity and the responsibility of a Charms Class professor both drove him to forgo sleep and spend the entire night researching Ian's situation. Hogwarts might gain another professor with dark circles because of Ian.
Professor McGonagall was not asleep either. She stopped the Gryffindor students from attempting to modify Wingardium Leviosa, then sternly criticized and lectured the reckless boys and girls who had tried to summon a wild buffalo in the Common Room. After making the ringleaders reflect deeply, she returned to her own quarters and, unable to resist the urge, summoned a wild buffalo herself.
The clattering sounds were Professor McGonagall's attempt to conceal her nature. Meanwhile, Hufflepuff's Head of House, Professor Pomona Sprout, had been forcibly dragged by Snape into giving Professor Quirrell an extensive examination, and was now snoring alongside the Young Wizards. Snape, who had delayed her for several hours, was still staying up late.
Quirrell was still trying to secretly contact his master. Snape, who had already begun tailing him, watched from a corner. The great bat in the shadows silently recorded everything Quirrell said and did. Even the number of times