Angels come from the angel world to teach mankind to be more divine. They can come to anybody. All of them have wings. When angels want to fly they spread their wings. They keep them folded when they do not want to fly.
Angels wings are delicate, but strong at the same time, extremely beautiful.
Their food is made from ether. In between this physical earth and the higher realms, there is substance called ether. It contains all kinds of energy. It can be taken as solid food or liquid food. It is part of the cosmic life energy.