After the King of Adarlan had slain Rhoe, Evalin and Orlon, her mother Lady Marion sacrificed herself to save Princess Aelin. Her father Cal Lochan worked as a rebel leader against Adarlan, and was executed shortly thereafter.
Her uncle Vernon - Cal's younger brother - was assigned to be her caretaker. Vernon was very cruel, which was evident when he watched his own brother's execution and stole his title as Lord of Perranth. A few years into his warden-ship of Elide, she fell down a flight of stairs and badly injured her ankle. Her uncle however, not trusting any healers, refused to have her ankle looked at, causing her to be permanently crippled. During her time under the warden-ship of Vernon she had a nursemaid named Finnula who taught her almost everything Elide knows, and as she did not have any other teachers she can’t read since Finnula could not. Sometime during her childhood she began praying to the Goddess Anneith the goddess of Wise things and slow deaths, she also caught the attention of the goddess and the goddess began guiding her and giving advice.
Ten years later, Vernon brought Elide to Morath with him, as he acted as an adviser to Duke Perrington. In Morath, Vernon assigned Elide to be a servant and had her legs chained, preventing her from running away and making her limp even more pronounced.
Elide played the act of a timid and frightened girl, but spent her time at Morath secretly looking for ways to escape. The heir of the Blackbeak coven Manon Blackbeak first encountered Elide whilst she was cleaning the fireplace. Elide continued her demure act, although Manon saw through this and assumed Elide was a spy; Elide tries to assure Manon that she is not a spy by informing her she is unable to read. However, after cutting Elide and tasting her blood, Manon confirmed that Elide had witch blood.
Asterin discovers Elide has witch blood. Manon demands Elide to act as a spy for the Thirteen and offers her protection in exchange. Elide, as a servant, has access to the rooms in which the Yellowleg witches were being kept to breed demons (unbeknownst to Manon at the time).
From this point on, Elide stays in Manon's room and continues to plan her escape. However, when Manon and the Thirteen are called to the Oakwald Forest, Vernon takes the opportunity to capture Elide and lock her in the dungeons. He informs her that he knows of her witch blood, and he is planning on using her for a breeding experiment—the same way the Yellowlegs witches were used.
As Elide is being taken to be implanted, Manon finds her and slaughters all the guards who were manhandling her. Her and Manon then run, only to be stopped by Kaltain, who informs them that she destroyed the Valg prince who was inhabiting her body and plans to help them. She gives Elide the Wyrdkey that Perrington had put inside her arm and makes her promise to deliver it to Celaena Sardothien. Elide promises, and then her and Manon run to the aerie.
Manon and Elide barely escape the blast as Kaltain uses her powers to blow up a third of Morath. However, when they finally land safely, Manon informs Elide that the King of Adarlan has been killed by Aelin Galathynius. Elide thanks Manon for saving her life, and sets off with the Wyrdkey to be reunited with her queen and her court.
Since escaping from Morath, Elide has been wandering through the woods in an attempt to find Queen Aelin. This is where she runs into Lorcan Salvaterre—Fae Queen Maeve's second-in-command who is hunting down the Wyrdkeys (one of which is in Elide's possession). After discovering that Elide is from Morath, Lorcan strikes a deal: he will protect her, and in return, she will give him every detail he needs to get into Morath. Along the way, they run into a carnival troupe. Lorcan and Elide pose as husband and wife and join the troupe, so they can better blend in.
Following the events of the previous book, Elide still harbors anger and resentment towards Lorcan. She says awful things to him that causes him to give up in battle and let himself get cut down. Elide rides out, risking her own life, to save him from bleeding out and drowning in the waves of water, which is threatening to break through the dam. On the ride back to safety, Lorcan confesses his love for Elide and then tries to slip off the horse to lessen the weight so that she can live. Elide grabs his arm, forcing him to stay on the horse; if he tries to fall she would fall with him. She gets him back safely, though Aelin's fire is what ultimately kept them both from the water. Elide fell asleep sitting at the end of Lorcan's bed as he slept. When he wakes up, she asked him if he meant what he said, to which he replies that he did. They kiss, and Lorcan hints that they would eventually have sex, but only when she was ready.
Fast forward, Yrene Westfall tells Elide that she can heal her leg, but it will take a long time, but eventually, she will have to get it fixed. Elide is informed that they have her uncle in custody.... to be continued.
Elide is described to be cunning, smart, and deceptive. She can't read, but that only propels her to achieve more. She has a courageous heart and lives to serve the Queen of Terassen.
Elide has a pale, triangular face, onyx eyes, and long black hair. She has a crippled foot, described as a mass of glossy scar tissue which is connected to the other with a chain that stops her from ever trying to escape. According to Vernon, Perrington, and Elide herself, she looks almost strikingly similar to Kaltain. Elide has a full chest, but she binds it to avoid attracting unwanted attention.