As he stood there listening to what was being said, Trumpkin couldn't believe his ears. The Kings and Queens of Old were leaving! He knew he shouldn't be listening in on their conversation, but he couldn't help it. They had been through too much together. These were the humans that had given him and his friends back their freedom. He had fought alongside them in two battles, had met Aslan because of them, and he'd had his life given back to him--literally--because of the youngest Queen.
Queen Lucy...yes, she had given Trumpkin his life back, in more ways than one. It was true that in using the juice of the fireflower, she had saved him, but at some point during their journey together, she had also become his friend. Queen Lucy was more than just a fairy tale or someone out of a history book. She was real, and she cared about him. It had really bothered Trumpkin when she went off into the woods alone before that final battle against the Telmarines. He'd wanted to go with her in order to protect her, and if it had been any other person but Queen Lucy, he would have pressed the matter, but he left it alone when she told him that she needed him to stay behind.
Just then Trumpkin heard High King Peter say that Queen Lucy and King Edmund would be coming back. He hoped he would still be alive when she returned to Narnia. The Kings and Queens of Old began saying their good-byes, and Queen Lucy stopped in front of him. He looked up at her and thought he saw tears in her eyes. As they wrapped their arms around each other in a fond embrace, Trumpkin was sure that he heard her sniffle. He watched as they walked toward the tree in which Aslan had formed a hole, and as they disappeared, he whispered, "Good-bye, my D.L.F., until next time."