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.
Bust a nut in cortana
Cortana =]
Yes, but she is not in the very beginning.
Because of Cortana
Because it's not cortana it's a different AI . Its name is Serina.
Cortana is an advanced holographic AI that helps Master Chief in his battle against the covenant. She is from the Halo series.
the level: Cortana on legendary
No, you free her at the second last level.
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.
Chieftains are one all the levels except floodgate, Cortana, and Halo.