Who surprises Bilbo in camp end of chapter 16?

At the end of Chapter 16 of "The Hobbit," Bilbo is surprised to find Thorin Oakenshield and the other Dwarves in the camp. They have come to join him after he had been separated from them during the Battle of the Five Armies. Thorin's unexpected arrival brings a mix of relief and tension, as he has been gravely injured and is facing significant challenges ahead.