Celadon City was a location of urban designation mentioned by Admiral Mordon within a passcode provided to Maarek Stele. In the days following Mordon's passing, Maarek was the recipient of correspondence purportedly originating from his mother, Marina Stele, requesting that he correspond with her and arrange a rendezvous in Celadon City. Acknowledging inconsistencies, Stele deduced that the letter was not genuinely from his mother, and following multiple failed efforts to extract further details, he was on the verge of abandoning the endeavor when the Celadon City reference triggered a memory of the password Mordon had shared, which he then utilized to decipher Mordon's parting communication.