The sithe, or dark elves as they are more commonly known, share common ancestry with the caeltir. Like their cousins, they have a close bond with the natural world and the elemental and mystical energies that flow through it.
However, they responded differently to the pressure brought about by the increasing numbers and power of humanity in the past three millennia, culminating in the Roman invasion of Britain and the subsequent Christianisation of the land which resulted in the suppression of traditional celtic cultures.
While the caeltir responded by retreating to the woods and forests in less populated areas of Britain, particularly in the north and in Wales, the sithe turned to dark forces to defend their homes, primarily in Ireland and some parts of Scotland, and took the fight to humanity. This led to the emergence of the Witches and to the sithe affinity for darkness, death, and demons.
Today, the sithe still resemble their caeltir cousins, with their tall, slim frames, fine features, almond eyes and pointed ears. But unlike the caeltir, sithe skin tends to pale white or dusky grey, depending on the magical or demonic influences to which their ancestors were subject. For the same reasons, their hair tends to raven hues but is sometimes stark white, while their eyes can be inky black, dark green, or albino, and sometimes glow with unearthly light.
The sithe are a warlike people, who excel at enchantment, sorcery, skill at arms and stealth. They set great store by personal freedom and individual prowess. They are also a fragmented people, without unifying kings or queens, and have been less than the sum of their parts for many centuries. Some serve the Witches, as the most powerful of their kind, though typically with loyalty to only one of them, adding to the divisions within the race. Others are assassins or members of mercenary bands, selling their services across Europe to the highest bidder and occasionally uniting to defend their homes against a common threat.
Favouring the flexibility and independence of small groups, which facilitate the guerilla tactics at which they excel, sithe tend to organise in bands of five known as Hands. Typically a Hand will be made up of members with different, and complementary, skills;, and it is not uncommon for Hands to join together for particular engagements, whether to defend their homes, fight a common enemy, or provide a larger mercenary force for an employer.