Despite our environment appearing to operate on automatic under the scientific physical laws of our Universe there is in fact a plethora of nature deities who keep our Universe in operating order. These include Gods, Goddesses, Nymphs, and of course Fairies. A Fairy, Faery, or Faerie, is a low level nature spirit with a mostly human like appearance that manages specific aspects of any given environment. In magical power they fall under nature Nymphs who they sometimes work with. Nymphs are known to manage seasons, forces of nature, landforms, bodies of water, general wildlife & plant life in local areas. Fairies handle more specific aspects of localized nature. This mainly includes specific species of plants, and animals but can also include localized phenomenon. Some even independently create new duties for themselves such as in the case of Tooth Fairies.
Despite being called spirits they don’t have an invisible non-corporeal, or out of phase
with human reality, form such as Nymphs. They actually exist in nature among the animals, and must hide like any other physical beings to an extent. Thankfully they possess the magic of nature which aid in them remaining hidden. This constant physical state of being is their greatest vulnerability yet it gives average humans a chance to catch a glimpse of them. Along with magic they have the advantage of being quite small, and having mystical wings that are in fact an astral metaphysical energy form. That is why some fairies may appear to have wings while other may not. The smallest fairies might not even be visible by the human eye while the largest fairies are the size of a robin.
This small form isn’t the only state they can exist in. They can transform into a normal sized human like form. This is somewhat the equivalent of a Nymph taking physical form. It takes a high level of power to maintain this increased stature, and they lose the ability to fly as well. There’s also a reduction in magical powers. When in large form they are often mistaken for Nymphs. They make take this form to partake of missions in the human world, or in some cases a human catches their sensual eyes.
The origins of Fairies are a well kept supernatural secret. It’s thought that they could have been spontaneously created by the collective consciousness of animal, and human coming together for the first time. Something similar to the theory that some Gods were inadvertently created by the human collective consciousnesses. Another line of thought says the Gods & Goddesses created them as was the case of Elves who were meant to be the workers of the Gods. It’s also plausible Fairies are simply demoted deities who angered the wrong Powers That Be! Where ever they came from Fairies can be helpful to humans & integral to nature. Although they can also be malicious depending on the specific species they belong to, and the influence of a higher power over them. This can include human practitioners of magic, demons, or other higher dimensional entities of evil!