By the power of truth, I, while living, have conquered the universe.
Posted by: RotaryCookie
She has, as far as Halo 3, just endured month(s) of interregation, torture and e--blam!- at the hands of Gravemind, and is now left alone to wait for Chief to awaken.
I'd say she is metastable, but that sort of trauma would have a negative effect on anyone. She is still a sentient being after all.
I think after they get back to earth and she's been debriefed and had time with Chief that doesn't involved near-death experiences, we'll see she is metastable more clearly.
How about that for a storyline? UNSC HQ try to shut her down, thinking she's rampant and chief goes rogue to protect her?
We get human-human fighting, love story and a new plot that doesn't involve mindles shooting of aliens. Everyone is happy. :P
It took Mendicant Bias (a much more advanced Forerunner AI) 100,000 years to become metastable and beat rampancy after going through the same thing as Cortana.
Origins shows that she has succumbed to Rampancy, Frankie further confirmed it in the Halo Legends DevCom.