At the end of the first season, when Ai-chan meets Akatsuki, she says that Salamanders work to keep Aqua warm by fighting one another inside the floating building seen in the series.
However, I can't really believe that Salamanders just fight one another all day and night to keep the planet warm. So what is it Salamanders actually do and why does Ai-chan think they fight one another? (because Akari can't have been the one to put that in her head.... right?)