Emery is a deranged and violent man who usually attacks first and asks questions later, with the major exception being Geff Rodrigo, but only because Geff's survival serves his purposes.
In the dead of night during Fax, Emery drives up in a warthog from the ocean to the beach on Outpost High Ground. After parking it and stepping off to look around, he exchanged a look with Prim. Shortly after, in Machine, Cayde Jasper walks to the beach on patrol before Emery gets his attention and beats him to death. The next day, Emery steals fuel from High Ground in his backpack while observing the other guards of the outposts. Despite being seen in broad daylight, the guards do not acknowledge him even despite one of them bringing up that he saw Emery's warthog on the beach. Shaking his head, Emery heads back to his warthog where he is chastised by Prim as they discuss Emery's mission: Finding Geff Rodrigo on Outpost Black Out.
After stranding Geff and the guards from Outpost Black Out on Cold Storage, creating a lie about their Spartan status as seen in the opening of Dare, Emery goes and eliminates the guards on Outpost Ice Box in Elsewhere. Now joined by Prim, a manifestation of Emery's more rational thoughts, Emery returns to Cold Storage in Arrival to threaten June and Sarah before hiding again.
He returns fully in Truth, in which he expresses his identity as a hitman with no ties to the UNSC and that he intended to take Geff in order to spite the engineer at Trinity who happens to be Geff's mother. When Miller attempts to tackle him, Emery simply hits the old captain unconscious with the butt of his rifle before doing the same to Geff. However, during Dare, Emery and the guards are ambushed by assassins Molotov and Cocktail on behalf of Trinity, leading Emery to take Geff and dive into the ocean.
Later, arriving on an unknown shipyard, Emery and Prim squabble before Geff wakes up. Despite keeping Geff alive through the ocean swim, Geff expresses discomfort with the situation, leading Emery to yell at him.
Emery makes a guest appearance in the final episode of WarGames, Ambush, where he returns to Outpost High Ground after the events of Classic Season 1 to steal more fuel when he decides to eliminate members of The Damned who took control of the outpost since he had last been there. While he does successfully kill Riel and Kazi as well as several of their robot allies, he misses his shots for Corvus and Pink. After Prim criticizes him, Emery discovers the body of Louie Vargas wearing the Recon chest plate, in which he immediately takes to complete his Recon armor set. Emery then decides to set off rockets from his pelican to fire at the outpost. Returning to his pelican after, Mitchell Miller asks if it was really necessary to attack the outpost, though Emery just insults him while dodging the question.
Trivia
Much, if not most, of Emery's dialogue is improvised by his voice actor, Revoltge.
In the original script for Infinity, Emery was intended to be a throwaway character as an inexperienced UNSC pilot. When series co-writer Revoltge was cast, the character's personality was drastically changed and his role was later expanded due to Syp The Mighty enjoying his performance so much.
He is exclusively referred to as "the Pilot" from his debut until Reactionary. Revoltge had actually came up with Emery's real name in 2012 while he and Syp were producing Annoyances, a Guard Duty Sides episode. It would not be revealed until 11 years later, in Truth, the penultimate episode of Classic Season 2.
Revoltge also chose Emery's color scheme and armor set, as it was based directly on the armor set he used in Halo multiplayer at the time of Infinity's production.
While he debuted wearing a Scout chest plate in Infinity, he instead has a Recon chest plate to complete the armor set upon his return in Elsewhere. This was an error, as Syp had misremembered his chest plate during production and had yet to fully rewatch the first season. Because of this, Syp included an explanation in the final episode of WarGames, in which Emery appears with his original Scout chest plate before stealing the Recon chest plate from the corpse of Spartan Louie Vargas, who had died in the previous episode. For consistency, Emery is seen wearing the Scout chest plate again in Dare's opening flashback to when he lied to the guards about being reassigned to Cold Storage.
In Truth, he reveals he used to be an ODST and fought during the Invasion War prior to becoming an assassin.
