Lucia

Lucia is the succubus companion/servant to Marcus. She is only encountered in the desert. She will first be found with Markus, and seems upset but overall indifferent to your presence. If you advise Markus to go demon, she will walk to you and offer carnal delights upon your next meeting, after which she will sprout wings and flies off with her "master" but never delivers on her promise.

After giving your opinion to Markus, you will occasionally receive a bottle of Succubi's Delight in one of two ways depending on what you chose. If you tell Markus to become a demon, you will encounter Lucia from time to time in which she drops a bottle of Succubi's Delight for you. (If your Speed score is low, you may fail to catch the bottle, which spills out on the sand.) If you tell him to stay human, Lucia will be enraged, but will still leave a bottle of Succubi's Delight for you to find in the deserthoping to corrupt you. Either way you may receive a bottle, but with different text.

Trivia

 * According to Fenoxo, Lucia and Marcus were intended to become workers at the Demon Factory when it re-opened after being defeated, if Marcus was told to become a demon. If the player told Marcus to stay human, Lucia instead betrays him and sells him into slavery amongst her fellow demons.