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B
Breach: The moment in 2010 that the divide between the two worlds ceased to exist. Suddenly, humans could See the true nature of the supernatural beings among them, and the Fey could no longer exist in the Otherworld. No one knows the reasons for this.
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F
Faerie:Faerie, in the Otherworld, is the land within the Otherworld rather than the various entities that humans might consider Faeries. They refer to themselves as their specific type (i.e. Sidhe, pixie, goblin, redcap, troll). Likewise, they do not use the term Fae as a shortened version of Faerie. "Faerie" in the modern world of Los Angeles, is loosely used to mean any of Faerie's denizens as well as the "new generation" the Sidhe have created.
Fey: Fey means wild or magical, and the Otherworld beings use it to include all of the main "kinds" of supernatural beings (vampires, werewolves, Sidhe and the other creatures from Faerie); the only Otherworld beings not considered Fey are the Soul-Eaters and possessing spirits.
G
Geas: Pronounced gess or gesh, plural geasa. A taboo or obligation usually placed by a Sidhe onto another being. Seelie Sidhe commonly give their F2s a geas, often in order to protect them from some imminent doom. Any Sidhe and other members of Faerie can give a geis to other beings, though F2s may not. If a geas is broken, other members of Faerie can see that it has broken, and the "oath breaker" is shunned.
H
Hex: A curse, usually placed by a Sidhe, upon another. Unseelie Sidhe commonly give their F2s a hex of sorts when giving them their abilities, though any Sidhe and many other members of Faerie can hex other beings.
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R
Rex: The master, sheriff, or king vampire of a given area. The United States is broken into West, Central, and East. The Western Rex rules over the vampires and V2s of California, Washington, Oregon, Arizona, Nevada, Idaho, Utah, Alaska and Hawaii.
S
Seelie: The court of Sidhe and lesser creatures of Faerie associated with spring and summer, wilderness, birth and life.
Sidhe: Pronounced Shee. The Sidhe are the dominating race in Faerie, human in size and shape, though more angular and willowy in appearance.
T
U
Unseelie: The court of Sidhe and lesser creatures of Faerie associated with fall and winter, death and decay.