During Harry Potter's journey to destroy the Horcruxes, Ron had dropped out halfway through, wanting to stay with his family. Like a prodigal son returning home, he went back to his family, yet before long he set off again to find Hermione. He heard Hermione's voice through the Deluminator, then Apparated to her side.
Georgiana idly toyed with a Deluminator conjured through Transfiguration, absentmindedly listening to the irrelevant clamor.
Hufflepuff's Cup was hidden in the Lestrange family vault at Gringotts in London. It did not stand out among the many treasures, and viewed that way, the Geminio Charm could serve as a theft deterrent. There was no need to reinforce it with a powerful curse like the ring containing the Resurrection Stone.
She had always thought that the guardian civet of the French Ministry of Magic used duplication magic, and compared with the fire dragon beneath Gringotts in London, it was far too weak. But thinking back on it now, keeping a dragon underground in the middle of a busy city did not seem like a good idea. If Harry, Hermione, and the others released it, and its first instinct was not to flee but to breathe dragon fire and reduce the surrounding streets to ashes, London might suffer another Great Fire.
If the civet was like a Möbius strip, then it had originally been one, only to be cut apart and become two. Though magical attacks caused it to split, it was no different from an ordinary cat when faced with other methods. That way, they would not threaten Muggles even a block away.
It needed to absorb magical power in order to split, or perhaps it lost its ability to divide endlessly once it left the Ministry of Magic. Otherwise, they would soon fill the entire world.
Heraclitus