"I have an urgent message for my master," said Oriole to the runic guards blocking their way. "Please let me enter the ruins. If not, then our inheritance will be swept clean by outsiders."
Oriole played the card Runera was conscious of, their mission. Although Arthur and Oriole did not create such a thing in the other life, it seems the existence of these mysterious ruins made the impression that Runera had a greater purpose that needed to be fulfilled.
That might be true if Arthur and Oriole figured out who created these ruins and Runera in general. If it has just been Runera, then the epiphany might have been enough explanation. However, the existence of these ruins, which no one knows of its purpose, left them in doubt.
"We were asked to keep everyone away. Please wait outside until the grandmaster and the captain come out. You may attend to your wounds there," the Runic Guard glanced at his torso with concern.