Lamia

Marian Lamia (also known as Lamia) was once a Greek demigod, a daughter of Hecate, and Queen of Libya but was turned into a monster by the goddess Hera in revenge.

Early History
Lamia had attracted the attention of Zeus and accepted his courtship. But upon doing so, faced the wrath of the jealous Hera. Hera killed her children, Altheia and Demetrius, and then Lamia was turned into a monster. Angered at the goddess, she used an incantation to allow all the monsters in the world to sense the taint of half-bloods, so that they could always be found. Lamia did it out of spite so that Hera would finally understand her pain of losing her children after so many demigods have been killed.

Son of Magic
Lamia is returned to life by Gaea who she sent to kill Alabaster C. Torrington, another child of Hecate. Alabaster tried to kill her several times but because Gaea has opened the Doors of Death and also because Thanatos was chained by Alcyoneus, Lamia wouldn't stay dead. After a speech given by Howard Claymore about his new book (the sponsor of which is Lamia), she notices Claymore and Alabaster interacting and pursues Claymore, only to discover later, he's an ally of Alabaster. She curses Claymore after their brief encounter, which shatters the protective magic Alabaster cast to shield himself from Lamia. But with Claymore's help, Alabaster discovers an incantation that will bind Lamia to the Earth, but their mother, Hecate steps in to intervene, saving both her children. According to Hecate, Lamia won't try attacking Alabaster again, knowing he could use that spell against her. Her fate is unknown.

Appearance
In The Son of Magic, she is described as having glowing green eyes with serpentine slits. Her fingers shriveled and hardened and her nails turned into lizardlike claws when she extended her hand. She also has crocodile teeth.

Abilities

 * Latin: She is shown to speak and understand Latin when casting her spells.

Demigod Abilities

 * Mystiokinesis: As a daughter of Hecate, she is able to cast magic. She is capable of performing powerful spells.
 * Mist Control: As a daughter of Hecate, she is able to control the Mist. This ability means she is able to use the Mist to alter mortals' memories and perceptions, and she can also use this ability to also summon items and 'Mistforms'.