[... Oh right. She can't mouth off about her Tower without having to explain it, huh? Man.]

... It's difficult to describe. In essence, it is a tower like one would find in any other world, but it is also one of three that allow mankind to continue surviving. So, in a way, it is a place for the remainder of humanity to live, as well as a place that provides energy to all symphonic-run machines, as well as Reyvateils.