Aliens, Espers, Time Travelers, and a Goddess

Mr. Saturn is easiest to suggest right now;

make his nose more of an emphasis, you can take a few pixels off of his head and make that smaller, after all the sideviews don't look very accurate. If I had more time I would typically show you an example, but seeing as how I am rather pressed on that particular resource, this is as much as I can do.