Ayit 'Sevi

This unidentified Sangheili was a Sangheili mercenary responsible for retrieving a bioweapon for the Office of Naval Intelligence in a false flag operation on Ven III.

Biography
This Sangheili was hired as a mercenary by the UNSC's Office of Naval Intelligence to extract a bioweapon on Ven III, a small, barely inhabitable planet that became home to numerous Kig-Yar pirates, smugglers, black market arm dealers, and slavers. After the UNSC High Command failed to respond to the pirate threat, Admiral Serin Osman hoped that the presence of the bioweapon would lure in to destroy the pirate nest. On May 8, 2558, a UNSC spy drone scouted the planet's surface and discovered the diseased corpses of several Kig-Yar in a laboratory. The drone observed this Sangheili leaving the laboratory shortly after with the canister containing the bioweapon. The drone reported the incident to ONI, who believed that the Sangheili was an operative of Jul 'Mdama and his faction, and it was believed that the Sangheili may have double-crossed the Kig-Yar in the facility and killed them with the bioweapon. In response, Osman sent Infinity to Ven III to capture the Sangheili for interrogation.

SPARTAN-IVs Gabriel Thorne and Naiya Ray were deployed to the planet to capture the Sangheili. During their mission, the Sangheili destroyed the spy drone. As the Spartans entered a canyon in the planet, they were observed by the Sangheili. When the two Spartans entered a structure, they were ambushed by the Sangheili and a contingent of Kig-Yar. During the resulting skirmish, the Sangheili attached a device on Thorne's armor and rendered him unconscious. Taking Thorne aboard his Ghost, the Sangheili fled the area. Ray pursued the Sangheili and followed him to the massive Kig-Yar black market. The Sangheili met with the Kig-Yar pirate queen that ruled the pirates on the planet and offered to trade her the Spartan. The Sangheili told the queen that he originally came to the planet for a bioweapon and warned her that the UNSC would be arriving in the Ven system shortly to rescue the Spartan. The Sangheili returned to the chamber holding Thorne along with several of the queen's underlings to complete the transaction. However, they were attacked by Ray who killed the Kig-Yar, freed Thorne, and captured the Sangheili. Upon the arrival of Infinity, GA-TL1 Longswords bombed the pirate base, and the Sangheili escaped and fled on a Ghost in the confusion. Ray grabbed her own Ghost and pursued him, eventually disabling his Ghost and capturing him. Before she could interrogate him, however, ONI operatives arrived and seized the bioweapon from the Sangheili. The Sangheili was then led onto a prowler by ONI agents, unrestrained.

List of appearances

 * Halo: Escalation