Hm, if the faeries ever become involved, it would be nice if it is something along the lines of the rich and colorful setting created by J. Corsentino, Time of the Faeries. In the beginning, there was the great mother of all, the Starlight Elemental. She expanded to fill the void and burst into so many motes of light. From this myriad flock, the faeries were born from the sparks of starlight. With them came the foremost daughters of the mother, the 4 great elementals of air, water, fire and earth.
In that primordial era, it was good, for a time at least. It was the age of the paradisiacal Kailand, the great faerie kingdom, with nature vivid and bright in its infancy, wonder and imagination flowing freely, and kai was everywhere to be had. Kai is the energy generated by all living things, and it is the sustenance of the faeries.
Alas, it was not to last, for a terrible misunderstanding between faeries and humans ignited the terrible war that consumed it all. From this suffering was born the Blood elemental, and the Machine elemental would eventually rise from man. In the end, the faeries had to withdraw from the world, and it led to what would become the great sundering of their kind. That which was one would eventually become three.
The commoner faeries withdrew beyond the veil of twilight, dwelling for countless centuries in that beautiful realm of Twilight. The royal faeries withdrew to the realm of E'ven, hidden behind the setting evening sun. It is a realm of light, heat, and air, with little water. In this place, the royal faeries would eventually metamorphose to become the angels. Finally, there were the faeries who could not escape the terrible conflagration of the eschaton. Trapped, they had something crucial ripped from their beings, a gaping hole that would drive them to endless hunger. They became the Darklings.
However, now, in the modern era, thanks to the heartfelt wish of one girl amongst other factors, the faeries are returning. From Twilight came the commoner faeries, trying to restore wonder and imagination to modern humanity, along with doing something about a world that has become so deeply choked by pollution. Those who try the old ways are the street faeries, sometimes being forced to ground their own wings for the magic necessary to work their wonders, for there is precious little of it left in the modern age. Others of them see the need to change and adapt their approach, and so they reformatted themselves, shedding their wings to become the Shadme, a new form of faerie for the new age. Finally, there are those who seek to use modern means to regain their old power, integrating modern robotics into themselves, becoming something of which none had ever conceived.
From E'ven, the royal faeries of eld returned, now angels. They seek to control the wider global stage, viewing the longer term, adhering to doctrine and dogma, seeing the need to control man from the boardrooms and high places to ensure that another such terrible war between man and faeries will not arise. Amongst them is Inanna, one of the mightiest of the angels, and she is also one of the angels with the least love for mortals. However, not all of the angels agree with this position, those who might want to seek another way to coexist with man. They are punished by having their wings and power stripped from them, their memories sealed, and they are cast down into mortal, frail bodies, weak, confused, adrift. They are the nephilim. The first of their number was Pandora, endlessly reincarnating into new vessels, seeking to regain her old power. However, if lucky, the nephilim can remember, regain a spark of that power, a spark that can grow into a brilliant fire, making their wings strong again and carrying them back to their heights of eld. Such is the case of Halyon. She has always been the greatest of the angelic host, and now she will stand at the forefront to lead the great angelic rebellion.
As for the Darklings, lurking in the shadows, feeding from human spirits and emotions, they too have advanced. A street faerie attempted an experiment, infusing a Darkling with glamour, which caused terrible results. From this project gone awry were born the Vampiri. A new and glamourous sort of dark faerie, an even greater threat than the Darklings, for the Vampiri can actually propagate and increase their numbers. Dangerously beautiful and alluring, the Vampiri seek to partake and indulge in it all, blood, sensations, pleasure, and emotions. Those that continue along this path far enough are becoming something else, something actually akin to dragons.
However, even for these darkest of the faeries, there is still hope. For some of the Vampiri, having gorged for so long, actually feel a need to use their abilities for good, to redeem themselves. Their nature is to consume. It cannot be changed, but they can change what they choose to consume from humans. These repentant Vampiri have become the Sin-eaters. What the Sin-eaters consume from humans are such things like incurable cancer or pain that they simply were never able to overcome, causing them to fester and stagnate. By doing so, the Sin-eaters allow the humans to recover, heal, to actually continue improving and progressing. Of course, this pain does not simply disappear, for the Sin-eaters took it into themselves. Therefore, the Sin-eaters need to suffer the entire length and intensity of all that anguish. The agony that Sin-eaters endure can never be fully measured, and it is a terrible burden. To paraphrase, some of the Sin-eaters go mad, while others backslide into the ranks of the Vampiri; as to the rest, however, the rest of the Sin-eaters soldier on as best as they can, hoping that their continued good deeds will someday right their karmic balance, allowing them to walk freely in the light once more, glad of the overall positive effect that they have had upon creation.
It would certainly be rather interesting for the Senshi to encounter faeries like Corsentino's Sin-eaters. Perhaps the Senshi and such Sin-eaters could help one another.
