I like the idea of their more abstract Noise form is a dark glowing tree with pale colours appearing between the "branches" and "roots". I don't know what sort of tree they would be when it's less abstract. I'm also thinking I might have them have a stained glass like tree could be the theme for their more abstract form. But I might want to save the stained glass for someone else? We'll see. Multiple beings could have a stained glass theme as well.