BY BLOOD - the maze runner

KATHERINE AND RICK were send together to the glade in the box, with a small paper. On the paper was written that they are siblings, and it was signed by their mother. They also had a matching neckles, with a small arrow on it. They didn't remember anything only their names, and when they arrived in the glade, others were surprised that they send a girl, and that they were two. At that time there was only five of them and trough the years people arrived every month.