Peeves was considered a prankster spirit. He had not become one after a living person died. He was generally thought to have no physical form, yet he could move objects, slam doors, and make noise.
But he had actually once been human. In one period of Hogwarts history, he had been gravely injured and warned everyone that the Giant was coming, but no one listened to him. Then he died in full view of everyone. Only when his ghost left his body did they realize he had not been joking. At that time, he had still been pearly white.
At least in Georgiana's lifetime, Peeves had already become colorful and visible.
Peeves fed on teenagers' desire to go out and have fun, their love of mischief. Put another way, human ghosts could also transform into "nonexistences," but they were not the traditional sort of beings transcending life and death, because they had once lived.
There was only one Peeves at Hogwarts, but there was only one living person here too: Georgiana, perhaps with Severus added to the count, if he came looking for her.
At least these Muggle-made nonexistences would not fly around like Peeves and suddenly conjure cannons to bombard a school.
This could become her new subject of study, if he did not exist.
When she returned to the hotel, Bonaparte was sitting by the fireplace, reading Nick Poirot's Travels. He seemed to have reached an amusing part, for he wore a smile. Yet he did not even lift his head, as if he had not noticed Georgiana returning.
After Ron returned to Hermione's side, he got beaten up. Hermione was nothing like the heroines in other legendary tales, throwing herself into his arms to give him a hug.
Now Georgiana very much wanted to deal with him