Ilithyia is introduced alongside her husband, Glaber, as he tries to persuade the Thracians to help him in the battle. Ilithyia surprises Glaber when she arrives at the camp without warning, claiming that she brought him a "gift": herself, completely naked under a thick fur coat. She wishes to please her husband and promises that if he does well, she will be able to speak well with her father to promote him. When the Thracian later known as Spartacus and his colleague report movement between the Getae armies, Ilithyia urges her husband to abandon his post and his word, inciting the Thracians without knowing riot and desertion.
In Capua, Ilithyia begs her father, Senator Albinius, to give her husband a chance for redemption for his misfortune with the Thracians, with which he reluctantly agrees. He warns Ilithyia, however, that he will not listen to other persuasions.
Glaber visits Ludus of Batiatus to humiliate Spartacus, informing him of his wife, Sura's slavery. Meanwhile, Lucretia entertains Ilithyia, and despite Ilithyia's aversion to food and drink (and the environment in general), the two eventually form a kind of friendship, as both reveal a more devious and cunning nature. Ilithyia is intrigued to see what usefulness Lucretia can still bring you, and is fascinated by the gladiators who practice in the training area below.