Around 2302, A.D., 0 Gundam's pilot recommended Soran as a Gundam Meister candidate to Veda, the super computer of the paramilitary organization Celestial Being. After joining Celestial Being at the age of 14 and passing all tests, Soran formally become a Gundam Meister and a new alias was given to him by tactical forecaster Sumeragi Lee Noriega, Setsuna F. Seiei., Gundam Meister to the close-combat specialized Gundam, GN-001 Gundam Exia, for their armed interventions. Introduced to the Meisters by Sumeragi, the Gundam Meisters Allelujah Haptism and Tieria Erde had their doubts about Setsuna due to the fact he was considerably young. Gundam Meister Lockon Stratos on the other hand didn't mind the age difference and even looked forward to working together in changing the world with the Gundams. The Gundam Meisters, along with the crew of theCBS-70 Ptolemaios (Ptolemy) would train together in technical training and military exercises until they were prepared to initiate their armed intervention campaign.