Caster

A Caster is a "higher being" with the ability to use magic, known as casting. Casters are technically human, however their essences as supernatural creatures make them higher and more enlightened than normal humans. A Caster, except the Duchannes family, is able to choose whether he or she wants to become Light (good) or Dark (evil), depending on their true nature, personality, and at any time. Casters can both theoretically and practically be considered witches, warlocks, wizards or sorcerers; however, they prefer the term Caster as it is unique and carries no Satanic innuendos as Casters have been persecuted in the past as Devil worshipers.

The Duchannes family curse
However, Casters from the Duchannes family do not have the choice to claim themselves since the time of Genevieve Duchannes, when she used the Book of Moons to revive her deceased lover Ethan Carter Wate. Eventually, her spell failed and she was Claimed for the Dark, while the Book still took something in return for the spell: Her entire lineage's free will in the Claiming process, meaning they would all be claimed at the age of sixteen under the "Sixteenth Moon" and chosen upon their true nature either to be Light or Dark.

This applies to every Duchannes family member, except with the second Natural Lena, in the family, who gets free will. However, if she chooses to go Light, all the Dark Casters and Lilum in her family, like Ridley, Macon Ravenwood and Sarafine Duchannes will die. And if she goes Dark, all the Light Casters in her family like Reece, Gramma and her Aunt Del will die. However, she became a hybrid because she didn't want to choose because she knew whatever side she chose the other would die. Because of becoming an Light and Dark Caster hybrid only one person from each side died. Those two Casters were Twyla Valentin, a Light Caster and Larkin Kent, a Dark Caster.

Known Casters

 * Genevieve Duchannes (unknown - Light → Dark) †
 * Emmaline Duchannes (Empath - Light)
 * Althea Duchannes (Evo - Dark) †
 * Sarafine Duchannes (Cataclyst - Dark) †
 * Delphine Duchannes (Palimpsest - Light)
 * Barclay Kent (Shifter - Light)
 * Twyla Valentin (Necromancer - Light) †
 * Arelia Valentin (Diviner - Light)
 * John Eades (Evanescent - Light) †
 * Lena Duchannes (Natural/Cataclyst - Light & Dark)
 * Reece Duchannes (Sybil - Light)
 * Ridley Duchannes (Siren/Illusionist/Shifter Hybrid - Dark)
 * Larkin Kent (Illusionist - Dark) †
 * Ryan Duchannes (Thaumaturge)
 * John Breed (Caster-Incubus Hybrid - Dark → Light)
 * Obidias Trueblood (unknown - Dark) †
 * Macon Ravenwood (formerly Incubus → now unknown - Light)
 * John Breed's mother (Evo - unknown) †
 * Suffer doorman (Sybil - Dark)
 * Suffer doorman (Illusionist - Dark)
 * Floyd (Illusionist - Dark)
 * Necro (Necromancer - Dark)
 * Lennox Gates (Siren-Born - Dark)
 * Drew (Necromancer - unknown)
 * Lucia (Empath - unknown) †
 * Katarina (Diviner - Light)
 * Alicia (Thaumaturge - unknown)
 * Angelique St. Vincent (Palimpsest/Cataclyst Hybrid - Dark)
 * Mrs. Blackburn (unknown - Light)
 * Floyd's father (unknown - Dark)
 * Magnolia Blue (Shifter - Light)

Trivia
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 * It seems like a Sybil like Reece can't see through an Illusionist's tricks seeing as she couldn't tell that Larkin was a Dark Caster like Ridley and also they can't read a Palimpsest's mind due to it being blurry.
 * It's determined that a Caster's personality before they're claimed will determine when their powers come in seeing as Lena showed signs of being a Natural as a baby and Ridley as a preteen right before her 16th birthday developed her Siren powers to make guys do her homework for her.
 * Its unknown what type of Caster Genevieve was, but most think she was an Natural before she turned Dark seeing as her descendants Sarafine and Lena were part of a prophecy to end the curse which Genevieve started herself. Where the firstborn natural Sarafine turned into a Cataclyst while Lena had free will with her choice of being Light or Dark. With the fallout of her choice resulting in certain death for the side she didn't claim herself for.
 * Dark Casters seen with the Duchannes family such as Sarafine and Ridley are disowned from their family right after they're claimed for the dark as they can't enter Ravenwood Manor or any other Duchannes family property. Although Ridley ran away before her birthday as she knew she would been disowned on the spot.
 * However Ridley was able to enter to the Manor with Ethan because of his Wayward status when she first came to Gatlin and Sarafine attempted to enter during an Blood Circle ritual, but was stopped.
 * The coming of age for a Caster is their 16th birthday where they either become Light or Dark with green eyes for Light Casters as that means that they said no to the darkness of their "wicked counterparts" while Dark Casters who have the golden eyes were willing to become Dark and rejected the goodness of their "lighter counterparts."
 * There is high tension with Casters depending on their side seeing as Dark Casters are ostracized from most if not all Light Casters.
 * Sometimes a parent's and child's powers could be very similar.