Sometimes the angel is a ghost. As a Buddhist, I think of them as being basically the same thing; spirits, for lack of a better word, who observe and perhaps protect us. Or, depending on their mood, their unfinished business, annoy or upset us. Named for a departed friend, Sam I Am is definitely a ghost. The cloud-like color, the insubstantial, full of holes body; but then he's on a field of green, which indicates he's hopeful.