I’ve recently seen a thread in which the original poster questioned the reason behind John’s sadness over Cortana’s death. The OP claimed that Cortana was “just a computer”. I have seen this statement many times. Yes, factually, Cortana is an AI- a tool created by the UNSC to serve their needs. But to John, she was much more, and for good reason.
In this post, I will analyze the John-Cortana relationship (Corjohna, if you will).
First off, Cortana’s origins. Cortana is unique among other smart AIs in that she was created using living brain tissue- the cloned brain of Dr. Halsey herself. Although there is no factual evidence, this facet of her creation has arguably made her more “human”. She has feelings, desires, thoughts, fears. Like some AI before her, she has expressed a longing to be human. To be truly alive. To say that she is “nothing more than an object” is an injustice to the character.
Next, the intimacy of her relationship with John. Cortana is based off of the mind of Halsey- a mother figure to the Spartans. There was already a “familiarity” with John when she first interfaced with him. She CHOSE him, as HER Spartan. And that brings me to the point I’m making. She has literally been “inside John’s head”. She has felt what he’s felt. She probably knew him better than he knew himself.
From John’s perspective, the closeness of this relationship would obviously have a profound effect on him. When socializing with his fellow Spartans and other UNSC personnel, John has to keep a kind of emotional distance, as explained in First Strike. One of the burdens of command. With Cortana, this military equipmet that acts very much like a civilian, John is allowed more “emotional freedom”, as evidenced by his multitude of wry jokes and sarcastic comments geared toward her.
After the fall of Reach, when John thought all of his fellow Spartans dead, he still had the ever-so-friendly Cortana in his head. He was never truly alone, not on Halo, not on High Charity, not on The Ark, not on Requiem, so long as Cortana was with him. Given all this time, given all the hardships they’ve been through, John would grow accustomed to and like that voice in his head, his friend. It was his job to protect her, it was her job to protect him.
John didn’t let the Gravemind keep her, he didn’t let Del Rio take her, he refused to accept that she couldn’t be saved from rampancy. Cortana has saved John’s life more times than I’d like to list.
On to her death. After all of what I just mentioned, of course it would affect him like it did. Cortana was the last friend that he had (Blue Team is still MIA as far as he knows). He’s lost his fellow Spartans, Keyes, Miranda, Johnson, numerous others, and now Cortana. It’s not that John considered her more important than the others. Her death was, simply put, the breaking point.
With all that said, you can’t say that Cortana is simply a computer. She was much more than that to John. And as far as I’m concerned, she IS human.