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Cortana would run circles around Serina
Cortana without hesitation ! She is much more "human" than Serina.
Cortana, hands down
Definitely Cortana.
Serina and Roland, good. Cortana, better!!
how is this even a debate ? Cortana all the way.
pues cortana, sin duda alguna!!
Cortana. ♥
I still vote Serina.
There are a lot of advantages to a more human AI but, believe me there also some disadvantages.
As for the interaction, I really like Serina's British accent, sarcasm and tone.
It would be cool to be able to choose an AI in the Xbox's Waypoint app.

As for Roland he was cool but didn't like his attitude after Dr. Halsey tried to override him.
Cortana for sure
I love them both, and they have very nice booties.
This guy has his priorities straight ( ͡° ͜ʖ ͡°)
Definitely Cortana.
I think Cortana. Not just because she's the main A.I. character of the Halo franchise. But it is said that she's the most powerful A.I.
Cortana it so HOT..
she is cool but cortana is the best
Cortana rules, Plus shes smoking hot
I love them both, and they have very nice booties.
I concur.
Serena was great in Halo Wars, but Cortana wins in a landslide
cortana , being from the halsey doctor, is smarter , or at least I think so ...
Cortana is still better, especially with her sarcasm.
I love Cortana, but I have to go with Serina. I love her sarcasm, her accent, the way she looks, just everything. And the fact that she'd sent farewell letters in the name of the Spirit of Fire's crew is just heart touching and shows how lovely and caring she is beneath her shell of cold sarcasm :)
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