|031 Exuberant Witness|
|Powers & Abilities||Artificial control over the world of Genesis and its Sentinels|
|Portrayed By||Melanie Minichino|
At some point prior to the extinction of the Forerunner race at the end of the Forerunner-Flood War, 031 Exuberant Witness was assigned to watch over and protect the artificial world of Genesis from any potential threats. Years after her initial orders, Witness would be confronted by a powerful human constructed A.I. named Cortana, who took control of Genesis with the aid of the Forerunner A.I. known as the Warden Eternal. Feeling their invasion to be against Forerunner protocol, Witness attempted to halt Cortana's plans, only to have her control over the facility stripped away from her by Cortana and the Warden, locking her out of her own facility. Exuberant Witness would continue to plot against Cortana for some time until the arrival of human fireteam Osirus, whom she assisted in attacking Cortana's Promethean forces. After Cortana attempted to leave Genesis with her destructive fleet of Guardians, Witness managed to reclaim control of Genesis and used her workforce of Sentinels to rescue another team of human soldiers known as Blue Team from Cortana just before her escape into slipspace.
- Halo 5: Guardians (first appearance)