Hogwarts: A Little Transfer Student Shock

"Dumbledore! He, he's back!" Minister of Magic Cornelius Fudge burst into the Hogwarts headmaster's office in a panic. "Calm down, Fudge." Dumbledore remained composed as ever. "Voldemort will return sooner or later. All we need to do is accept it and defeat him." As he spoke, two owls carrying urgent letters flew in alongside the Minister. The senders were: Grindelwald and Tom Riddle. "Dear Dumbledore, sorry, I escaped..." "Respected Professor Dumbledore, I repent..." Looking at Cornelius Fudge, who was so flustered he couldn't utter a single word, Dumbledore stood up abruptly. "Wait! Who did you say is back?!"