First appears in: The Prime Trees
New Sydney is briefly depicted as one of the seven flying Cothellon cities, successfully reporting that it is "airborne and ready for gate drop" during the Ascension. While the city's architecture isn't detailed, its Under population is noted for their distinct and vibrant culture. During a mass battle, "'New Sydney!' a group of girls screamed as they exited the swirling gate," distinguishing themselves with "their hair dyed wild shades of pink and purple and green". Allain similarly observes that the Sydney girls "were different from the ones he was used to. They were more raw, more energetic, with hair in places he didn’t expect".