Evangeline is a young girl previously owned by Madame Clarisse's brothel. She was assigned to be Lysandra's acolyte, but Lysandra offered to scar Evangeline's face to spare her from a fate of prostitution.
Evangeline is a delicately built girl with porcelain skin and small hands. Her hair is red-gold, and her intelligent eyes are citrine. She is very beautiful, except for the deep scars on both of her cheeks. On her wrist, Madame Clarisse's tattoo has been branded over, marking her as a former acolyte of Madame Clarisse. Aelin believes her to be no older than eleven
Evangeline is quiet, observant girl. Perhaps as a result of living in a brothel, she tends to be demure. Despite her age, she is wise and understanding, as shown when she accepted Lysandra's offer to scar her face so would not have to spend her life as a prostitute.
Evangeline was rescued by Lysandra who saved her from a life under Clarisse's brothel. However to do this Lysandra was forced to scar Evangeline's face so she was no longer useful.
Lysandra and Evangeline ride in a carriage driven by Kellan Oppel to Aelin's apartment. When Lysandra begs Aelin to speak with her in private, Aelin threatens to kill Lysandra and Kellan and ensure that the "little protegee" says nothing, remarking that the girl will probably be pleased if Lysandra was killed. Lysandra insists that Evangeline is not her protegee and is not in training. After blackmailing Kellan to secure his promises of secrecy, Aelin opens the carriage door and orders Evangeline to exit the carriage and both her and Lysandra to go inside. Lysandra objects, saying that Evangeline can wait in the carriage, but Aelin refuses to leave a child in a carriage in the slums and gently coaxes her out of the carriage.
Inside the apartment, Aelin shows Evangeline her favorite place to sit. She gives her permission to read some of the books in the apartment or eat a blueberry tart from the kitchen, offering her the choice of which to do. Lysandra watches her with motherly affection as Evangeline politely accepts the offer of the tart and vanishes into the kitchen. As Lysandra and Aelin speak, Lysandra reveals that she believes Arobynn has sent her as a gift for Aelin - a gift to be killed. Aelin immediately assumes that Lysandra has brought Evangeline to serve as a human shield, but Lysandra tells Aelin that she may kill her if she so chooses, and that Evangeline knows what Lysandra suspects and will say nothing.
After Lysandra gives Aelin the letter, Aelin orders her to leave. Evangeline reappears; Lysandra tenderly wraps an arm around her. Lysandra exits the apartment, but Evangeline stays and recounts her own story to Aelin. She tells the assassin that when her mother sold her to Madame Clarisse, she cried so heavily that she made herself sick. Clarisse assigned Evangeline to Lysandra, who Evangeline figured must have irritated Clarisse that particular day, since Lysandra was weeks away from paying off her debts and freeing herself. Lysandra cleaned her up and told her that she couldn't run away (as Lysandra had tried, failed, and consequently been punished brutally for fleeing) but that there was another way to escape the awful fate of a prostitute. Evangeline accepted the proposition, declaring that she would do anything to evade the suffering of the other girls. Lysandra cut her cheeks and began screaming in feigned fury to convince the others that she had injured Evangeline in a fit of rage. When confronted, Lysandra stated that she had hurt Evangeline out of fear that the girl would be a threat. As a result, Lysandra was beaten violently, though she did not cry. Clarisse then required Lysandra to buy Evangeline at the price she would have been worth as a full courtesan, forcing Lysandra into many more years of prostitution. (Lysandra later reveals that as Evangeline grows, Clarisse increases the debt for Evangeline, claiming that someone so beautiful would be worth much more than she originally told Lysandra.) Finishing her story, Evangeline curtsies and descends the staircase. Aelin momentarily reflects on the tale before following them down the stairs and catching her and Lysandra just before they could get into the carriage, asking them to wait.
When the King of Adarlan's elite guard abducts Lysandra, Evangeline rushes to Aelin's apartment and begs for their help. She is left in the care of Sayed Faliq while Aelin, Rowan, Chaol, Nesryn, and Aedion journey to retrieve Lysandra.
Following Lysandra's subsequent rescue, Aelin gives Lysandra a note marked with Clarisse's seal. Upon reading it, Lysandra learns that Aelin has paid hers and Evangeline's debts to Clarisse DuVency and that they may receive their Marks of freedom. Aelin then bestows the title of ladyship on Lysandra and suggests that she name Evangeline her heir. Evangeline and Lysandra have their marks formally stamped off before accompanying Aelin and the rest of her court to Terrasen. During the journey, Evangeline and Fleetfoot become fast friends.
After a disastrous meeting with a Lord Darrow, Aelin and Lysandra send Evangeline to live with Ren and Murtaugh Allsbrook, promising them swift retribution should anything happen to her while in their care. She is sent away with Fleetfoot for their own safety and Murtaugh promises to look after the girl as if she were his own Granddaughter. Evangeline cries, but takes comfort in Fleetfoot's presence and goes with Ren and his grandfather as requested.
Since Evangeline was assigned to her, Lysandra has acted as a motherly figure to her. She is extremely protective of her and is willing to sacrifice her own happiness and safety for Evangeline's well-being, as evinced by Lysandra's willingness to scar Evangeline's face and endure the resulting consequences, which included a violent beating and years' worth of arrears being added to Lysandra's almost-paid-off debt.
In turn, Evangeline loves Lysandra dearly. She explained to Aelin the story of how Lysandra saved her, which caused Aelin to reconsider her angry dismissal of Lysandra and the forging of Aelin and Lysandra's friendship.
Lysandra has been named a lady of Terrasen, so Evangeline may very well become her heir.
Needless to say, Evangeline has no love for the pimp. She dislikes Clarisse's occupation and her treatment of the prostitutes, especially Lysandra.
Despite the initial animosity between Aelin and Lysandra, Aelin was friendly and gracious to Evangeline, fueled by Aelin's gentleness toward children. Aelin, concerned for the child's safety, invited her into the apartment so she did not have to wait in a carriage in the slums while Lysandra and Aelin talked. Reasoning that Evangeline did not have many choices in life because she lived in a brothel, Aelin allowed her to choose what to do while she waited.
Evangeline served as a driving force behind the forging of Aelin and Lysandra's friendship, as she was the one who explained how Lysandra saved her, which softened Aelin's heart and made her reconsider her hostility toward Lysandra.
When Evangeline appeared at Aelin's apartment pleading for help rescuing Lysandra, Aelin not only set off to rescue Lysandra, but also ensured that Evangeline was safely in Sayed Faliq's custody while she and her friends were away. Upon their return, Aelin reveals to Lysandra that she has paid off her debt to Madame Clarisse along with Evangeline's.