- last post: 01.01.0001 12:00 AM PDT
Keep in mind that Cortana could have screwed the chief and the entire army in PoA in halo:ce in the beginning if that was her goal, but she didn't, At least during Halo 1-2 i don't think she is "bad" in anyways, infact she was more loyal.
The Two Betrayals, is because when the chief inserts the index to the core, cortana blocks it, and takes it, and during that scene it kinda looks like she "betrays" chief, by not allowing the installation to go off. of course, at that time we didn't know halo could've wtfpwned the entire gallaxy. the "second" betrayal would be when chief takes cortana+index and goes against the monitor
The topic on Cortana being taken over by Gravemind. I'm not going to choose one side, but I do know that she was a highly capable AI, being able to hack in to multiple covy systems, and if she has that much intelligence, i think she should be able to keep herself safe from any gravemind's "infection" but then again, nobody knows what Gravemind is fully capable of.
just my point of view :>