*spends some time looking at it*
Well, this just started as yet another I'm-bored image, and then it started growing on me. And ideas started to appear in my head; they often do. What I figured out is that this is something of a different dimension or perhaps a separate world. Their haircolour is a way to determine rank and also gives quite a lot of other information to those who know how to read it. I don't. -_- That sign away in the sky is an omen; a bad one. Their world might be destroyed. If that happens, then it's vital that they join forces and use their powers to get to another world; preferably a safer one.
Hmm...I suddenly got an urge to start writing.
Inked and coloured with colour pencils.