The aura is the glow you see from energy being consumed. To spirits, the energy flow is like our blood flow except they use it up without casting, which would eventually require a booster recharge. Everything in the Spirit Realm runs on energy. It is emitted from the Creator (The Almighty God, Yahweh). If the Creator died (but cannot) all life would cease to exist. That’s why Satan never intended to seek anything more than a lessor godship position. He knows that without the Creator he would not be able to maintain what little life force he has.
In addition, when it comes to manifesting there is a “ribbon material” that they use. It’s made from a finer material that they’re composed of. It also has to do with the Orbs that we so often find in paranormal photographs. The basic equation is that when they go through the veil to our side, they show up as an Orb and that Orb is a collection of their energy. The mind opens the door to the energy, and they cast whatever they want us to see. Often, the Cherubs remain as Orbs only. It just depends mainly on how far they want to go in casting their energy and particles of material. Orbs both reflect light and reflect light. Light produced from their energy – reflection from their matter. The producible light is generally beyond our ability to see on the spectrum which is why cameras with infrared light capabilities pick them up so much easier.
Orbs are the preferred way most cast. It contains energy and particles because it itself is composed of both. It’s an easy and efficient way to transverse the Spirit Realm. Energy also acts as a catalyst for forming the manifestations from their finer material. So, when we are able to see their swirling energy, that’s their true form, that we are not yet able to comprehend. Then, it casts a form we recognize. Only because we’re frail humans does it look like swirling energy, and that’s as close as we can get on this side to seeing what they really look like before we have made the transition ourselves.