I think it's just the regular breastplate for the "Berserker" class. They all seem to have one that covers the whole chest rather than just one side like we see on most Preds (probably as part of the reason why they're the tankiest class).
The angle
does make it look a bit more feminine there, but looking at some of the other shots of Berserkers like this one I think it's just the regular male version.
But it does seem like the helmets and colour options have a good chance of being used by any Predator, so I suspect we'll be able to make a female one with that armour if we want.