A good while ago I was shown this video http://www.youtube.com/watch?v=e4dT8FJ2GE0 by   tigertwins and I was quickly inspired to do something like this.

It made me think of how Krux, still on Earth, would spend many nights wandering the city and he would stop where it's desolate and he knew he could be alone. Though no longer a true angel, the essence that made him one was never taken from him. Expression through song is important to his kind and he would do so in one of the long walkways connecting the stations underground.

It's 2:45 AM on in a lone subway corridor he pours his heart into something other than battle that can keep his painful memories at bay. The pleasure of song and the divinity that is music. It reminds him of what he was and where he came from. As long as he can sing it can be as if he's home again.