Later in the book, Sabine also starts to stalk Ivy.

She also forges email from Cheyenne's address and sends them, leaves Reed the black marbles from the vote, pins up Reed's only photo of Cheyenne and her, put some of Cheyenne's clothes in Reed's wardrobe and switches Reed's perfume to Cheyenne's. She had left little 'presents' for Reed to find from Cheyenne, to make Reed feel convinced that she had caused Cheyenne's death. It is also found out that Sabine was Reed's stalker. She also murdered Cheyenne, and made Josh take the pills on the night he and Cheyenne hooked up. She forged the note that was supposed to be from Dash, slipped ecstasy into Dash and Reed's drinks at the Legacy, and took the video of them. Sabine reveals hat she is Arianaa Osgood's sister, and has been out to get Reed since she arrived at Easton. In a rage, Reed leaves for Kiran's pre-birthday party, where she knows Sabine will be. Reed is stunned that her best friend knows, and is apparently friends with the girl who killed Thomas Pearson, and nearly tried to kill her. The photo unfolds, and on the other side is Ariana Osgood and her father.

While in the room, Ivy knocks over a photograph of Sabine and her mother. They go into Sabine and Amberly's room, because they believe that Amberly killed Cheyenne, because Cheyenne was having an affair with Amberly's father. But when Reed and Ivy Slade team up to find Cheyenne's killer, they realise there is much more to Sabine than anyone knew. In Revelation, when Reed is kicked out of Billings House, Sabine seems to be her only true friend. Though Reed doesn't believe Sabine, she proves ultimately correct.

In Ambition, Sabine tries to convince Reed that Noelle is trying to take the leadership of Billings away from her. When Reed starts spending more time with Noelle, Sabine feels hurt and jealous. However, Noelle takes little notice of Sabine. In Legacy, after hearing a lot about Noelle Lange from Reed and the other Billings girls, is eager to impress her when she returns. Reed sticks up for Sabine, when Cheyenne, Billing's President, decides she is not good enough to initiate. When coming to Easton, Sabine is Reed's new roomate in Billings, and they soon become friends. She is described as being physically beautiful, with light brown skin, dark hair, and green eyes. She is a Junior transfer from Martinique. Sabine Dulac first appears as a character in the fifth book, Inner Circle.

Revelation by Kate Brian