Halling was the first adult Athosian who encountered the pioneering Atlantis team on the planet Athos. He lead them to Teyla Emmagan, the leader of their people.
A deeply spiritual man, Halling is loyal to his people and loving to his son, Jinto. He traveled with the rest of their people to Atlantis to establish a new life for themselves, relatively free from the constant threat of the Wraith. He briefly served as a guide to the Atlantis reconnaissance unit led by Sergeant Stackhouse, before he and the Athosians relocated to a newly-discovered continent near the island city. While they remain in communication with Teyla and Atlantis, there they hope to start a new life on Lantea. Halling was among the Athosians who were abducted by Micheal but have since been rescued by Col Sheppherd and his team. His hair was cut for unknown reasons when they found him.