Banderole is a hypothetical city imagined some hundreds of years ago. It is a city that is always right at the end of a war: victorious soldiers are continually returning, flags and banners unfurl joyously.
Banderole may construct itself through people's dreams. Prior to canon, Chine and Duvall found a house where people slept in the basement, and as they dreamed, pieces of junk arranged themselves around them into contraptions and parts of a city. It is later revealed that this occurrence has repeated at various points, and has previously been identified with Banderole.
Calen believes Banderole to be a reflection of Zevunzolia.