"Who are you? You... what did you do?" Barty Crouch Jr. and the House-elf both started in alarm as they were dragged into the Shadow Mirror World.
The House-elf was clearly more sensitive to magic and immediately looked toward Tris a short distance away. The perfectly replicated Shadow Mirror World had trees in it, so Tris should have been hidden from view, but the House-elf still spotted him.
Tris wore an unusually cautious expression.
Judging by their portrayal in the films, House-elves had considerable magical power; they simply didn't dare attack wizards lightly. Even Dobby had only driven Lucius back because he needed to protect Harry.
After that, he had never attacked another wizard, right up until his death.
Incidentally, the Dobby here was now living the absolute pinnacle of a House-elf's life. He was delighted to work for the Black Family and get to see Harry often. He beamed all day long, showing no desire for freedom whatsoever.
The House-elf opposite him was probably the Crouch family's House-elf. Tris wasn't sure whether the elf would attack him if Barty Crouch Jr. gave the order.
As for the House-elf's question, Tris had no intention of answering.
He slowly emerged and approached the wary man and elf. Looking at Barty Crouch Jr., Tris grinned. "You've got some nerve, setting off something like that with so many Ministry of Magic people gathered here."
Barty Crouch Jr. didn't answer. Instead, he glared viciously at him. "Who are you, you little brat? Got a death wish?"
"Heh, all mouth and no ability. You..." Tris was about to mock him some more when his expression abruptly changed.
Outside, in the real world, Harry and his two friends had just reached their location, probably drawn over by the incantation Barty Crouch Jr. had spoken when casting