In October 2015, Elijah's mother brought him to an Abstergo clinic in New York, in fact a front allowing Templars to collect DNA from the general population, at which point Abstergo discovered his nature as a Sage and that he shared the patrilineal lineage of Desmond Miles.
While Álvaro Gramática wished to kidnap the boy immediately and conduct a vivisection on him, Isabelle Ardant opposed this, claiming the young Sage as her own project and that such a decision was inhumane. She instead planned to have Abstergo abduct the boy once he was old enough, and then put him into an Animus for fifty years so they could study his lineage. Ardant was killed before this plan could be enacted.
Juno's poster boy
After Juno took full control of the Instruments of the First Will, the Isu and Violet da Costa sent Richmond to kidnap Elijah, and bring the latest avatar of the Juno's beloved Aita to her. Breaking into their home, Richmond stabbed Elijah's mother to death in the kitchen, before securing the sleeping boy in his bedroom. Brought back to the Isu, Elijah was then told of his true nature and potential by the Instruments, with Richmond being tasked to take care of him.
In February 2017, Elijah was among the Instruments which ambushed Barindra Mitra's cell in Hong Kong. Looking for intel about the Phoenix Project, the Assassins broke into the Abstergo offices located in a skyscraper but were soon butchered by the group. Sitting on a desk, the boy watched the ordeal, eating an apple, and spoke to Charlotte de la Cruz, acting as if they met before.
In March, Elijah attended a gathering of the Instruments after Juno discovered that the Koh-i-Noor was in Spain, making a speech alongside Jasdip Dhami to inform the crowd of cultists of their mistress' success. However, Violet da Costa was still wary of the young Sage, believing that his place was in a cage and warned Juno that the boy was his father's son and would betray the Isu. Juno discarded her lieutenant's warning, stating that the boy was happy to play his role in service of Juno's grand scheme.
Later, after the Instruments discovered the location of Gramática's secret lab, where the Templar was sequencing the DNA of the Isu, a strike team of Juno's followers as well as Elijah and their prisoner, André Bolden travelled there. Upon their arrival, the team led by da Costa and Dhami discovered that Gramatica succeeded as he was bragging about his genius before revealing themselves to the dumbfounded scientist. Da Costa then stated that they were there for the Phoenix Project, to create a new cloned body for their mistress.
Ultimately, Violet's fears were proven right as Elijah took his revenge on his mother's murderers, stabbing Richmond with a screwdiver and helping Charlotte to kill Juno. He then fled with the Koh-i-Noor.
- According to Elijah, the Isu affinity of his ancestry granted him the ability to keep Aita's memories at bay and to use the Isu's knowledge at will.
- Assassin's Creed: Syndicate (mentioned in Database entry only)
- Assassin's Creed: Uprising (first appearance)