 Ronon later becomes a permanent member of Sheppard's team, AR-1, replacing Aidan Ford who defects from Atlantis after Ford develops an addiction to the Wraith enzyme.Teyla Emmagan played by Rachel Luttrell is the leader of the Athosians, a human race of farmers, hunters, and traders from the planet Athos in the Pegasus Galaxy.After a Wraith attack on Athos, Teyla and the Athosians settle in Atlantis.