Pyrrha is from Argus

Pyrrha is from Argus, and her family is there
Team Oz is taking the Argus Limited train from Mistral to a city named Argus as the first leg of their journey to Atlas. And in addition to all of the various Argus’s/Argos’s in Greek mythology, there’s an actual city named Argos in Greece:

"A resident of the city of Argos is known as an Argive. However, this term is also used to refer to those ancient Greeks generally who assaulted the city of Troy during the Trojan War; the term is more widely applied by the Homeric bards." (From Wikipedia)