Standing before you is none other than Professor Arjun Kapoor, a brilliant Magical Transportation scholar from the Ministry of Magic. You'd only seen him once in a guest lecture at Hogwarts, explaining the magic of enchanted carriages and long-distance apparition networks.
"But… but you disappeared!" you exclaim. "There were rumors that you had gone rogue..."
"...or that I was taken by dark wizards," Kapoor interrupts with a sad smile. "I assure you, I am still very much on the right side of magic. The same cannot be said for our dear train driver." He gestures toward the unconscious figure.
Colby frowns, crossing their arms. "So, what now? If this driver really is a dark wizard, what was he trying to do? And why charm the train to go this fast?"