At White Council headquarters, Arianna is gorgeous in a goddess kind of way. Tall, dark hair piled high, ivory skin. She wore a red silk gown with plunging neckline and jewels on her throat and ears.
At Chichén Itzá, Arianna slightly changed the appearance of her flesh mask. Her facial features were pretty much the same but her nose was a bit longer, sharper and her skin color was now a reddish-brown and she had icy black vampire eyes. She wore a simple buckskin shift and a lot of gold jewelry.
Arianna had figured out that the Red King had lost control of his bloodlust and was therefore weakened and ripe for deposing. She built her one own power base within the Court and plotted to undo Harry Dresden since dealing with her enemies was critical to maintaining her standing in Red Court society.
At Chichén Itzá, Martin revealed that Arianna's true target was Blackstaff Ebenezar McCoy. "The child's father is the son of Margaret LeFay, the daughter of the man who killed her husband, Paolo Ortega." Martin admitted that he was the one who informed the Reds of Maggie's existence and her location. He saw her each time Susan visited her. It's how they found and slaughtered her adopted family.
In Changes, Ebenezar McCoy states that his own daughter Margaret LeFay had once invited him to the Raith estate for a dinner she was holding. Arianna was in attendance and witnessed Ebenezar and Maggie arguing—like family. Arianna caught on and filed it away.
In the seriesEdit
In Changes, Arianna goes to the White Council headquarters as a plenipotentiary ambassador. Her mission to negotiate peace is a ruse meant to further her plot of revenge against Dresden, lull the White Council into a false sense of security while the Red Court are massing for a new attack and infect the White Council with a disease. She is abetted in this by new Senior Council member Gregori Cristos.
Arianna being at White Council headquarters as the Red Court's emissary for peace effectively blocks Dresden from getting the aid he needs from the White Council to get his daughter back. She was playing dirty. Dresden stormed into the Ostentatiatory anyway demanding that she return the girl she stole from her family or face him in a duel. Cristos, who's pandered to Arianna and backed by a large Council contingent, accused Dresden of restarting the War and breaking Safe Passage in the Accords. Dresden is escorted to the Worry Room by Anastasia Luccio.
Later, Dresden tells Ebenezar McCoy that Arianna plans to sacrifice Maggie, his daughter, in a ritual sacrifice Bloodline curse at Chichén Itzá. Ebenezar tells Dresden that while Arianna was there, she laced the Edinburgh facility with some sort of disease, sixty wizards are down, more are expected. Eben warns Dresden to stay away.
At Chichén Itzá, Dresden evokes the Code Duello in the Unseelie Accords by challenging Duchess Ariana to a duel on the basis of her kidnapping his daughter. Dresden is betting that the Red King will go along with this plan to get the Duchess out of the way. In the Temple of Kukulkan, Dresden makes a deal with the Red King to kill Arianna in a duel in exchange for taking his daughter home safely through Alamaya as interpreter. 
Just prior to the duel, Arianna admits out that Dresden was not was the real target, implying that she knows a secret Dresden doesn't but should. Her other goal was a seat on the Lords of Outer Night after one of them ascends to be King once she has ousted the Red King.
- ↑ 1.0 1.1 1.2 1.3 Changes, ch. 44
- ↑ 2.0 2.1 2.2 Proven Guilty, ch. 26
- ↑ Changes, ch. 8
- ↑ 4.0 4.1 4.2 Changes, ch. 7
- ↑ 5.0 5.1 Changes, ch. 38
- ↑ Changes, ch. 9
- ↑ 7.0 7.1 Changes, ch. 43
- ↑ Changes, ch. 48
- ↑ 9.0 9.1 Changes, ch. 49
- ↑ Changes, ch. 6
- ↑ Changes, ch. 7-8
- ↑ 12.0 12.1 Changes, ch. 40
- ↑ Changes, ch. 02
- ↑ 14.0 14.1 Changes, ch. 21
- ↑ Changes, ch. 42
- ↑ Changes, ch. 44 and 45