actually that what Junpei said to confuse Ace since he has that problem where he can not tell what people faces are.
Ramonra said:Zero is not Akane. We learn that from preview B. Which says
"Unfortunately, that's the wrong answer. Actually...I'm Santa"
Also, there would be no Zero if little Kanny died. Of course, there's the chance of the time something.
Kanny was saved in the past --->Kanny exists in the future so that Kanny is saved in the past.
But I don't think this game would come up with that, what was confirmed with preview B.
We were made think Akane was Zero because of that if the guys knew Santa was Zero, they wouldn't react...nicely.
Of course, that's what I think, and what in my opinion, is clear enough from Preview B.