Energy beings are typically rendered as a translucent glowing fluid or as a collection of flames or electrical sparks or bolts; somewhat in common with the representations of ghosts.
The extraterrestrial Paul in the science-fiction film of the same name, although not constructed of energy, can manipulate energy both telepathically and physically. He can repair damaged tissue in a form of resurrection, and he can also project an image of the Universe into a human mind and make them comprehend the immensity of space-time. His home galaxy is the Andromeda Galaxy, thus placing him in this category.
FMians, AMians, UMAs, and Wizards from Megaman Starforce which also have the ability to merge with a human in which form they can go between energy and physical.
The Rakshasa is the novel Lord of Light by American author Roger Zelazny, a race of formerly physical beings that "lived in cities" that converted themselves into patterns of energy of that sustain themselves.
