After a 43 year long conversation with the ancient being known as the Primordial, 05-032 Mendicant Bias went rampant and defected to the Flood…
Mendicant Bias was the most advanced AI ever created by the Forerunners, a Contender-Class AI that had knowledge and intelligence far surpassing even the brightest of the Forerunners.
In CE 2549, UNSC AI Cortana was created by a cloned brain of Dr Catherine Halsey. Cortana was the most advanced AI ever created by the humans, her abilities far surpassed even the works of the Assembly.
In November of 2553, Cortana was left aboard the Gravemind inhabited High Charity to allow the Master Chief an escape from the doomed planetoid. She was interrogated by a Gravemind for an extended period of time. This left her quickly spiraling into Rampancy…
Both of these AIs are extremely similar in their roles for their respective stories. They are both abnormally advanced, they easily exceed their makers… They both had direct contact with a Gravemind for an extended period of time. They were both fragmented several times before. They both went missing before their true defection…
Cortana has gone missing, we are unaware of her ultimate fate. Most assume that she’s dead, others cannot bare (lol see what I did there) to accept the loss of their favorite female avatar.
But the final fate of Cortana may be far darker than either her death or her limited survival combined… She will defy gods and demons, repeat the same actions of the infamous Contender-Class AI. She will uphold the will of the Precursors, ensure that no creations will ever rise against their creators…
After all, Halo 5 is supposed to be a far darker story…