Cortana is an AI (Artificial Intelligence)
yes
Cortana is a character from the game Halo. The voice behind Cortana is Jen Taylor. Halo is based on a fictional artificially intelligent character. While the game is in play, Cortana provides the back story and tactical information following the Master Chief.
Cortana =]
Yes, but she is not in the very beginning.
Because of Cortana
Bust a nut in cortana
Cortana is an advanced holographic AI that helps Master Chief in his battle against the covenant. She is from the Halo series.
Because it's not cortana it's a different AI . Its name is Serina.
the level: Cortana on legendary
No, you free her at the second last level.
Chieftains are one all the levels except floodgate, Cortana, and Halo.
She may or may not. There may or may not be a Halo 4. So far, the closest to Halo 4 I have found is Halo wars.