ada and carla?????

It is rumoured that ada will be a playable character after the completion of all three main campaigns. Like resident evil 4, ada will sport a grapple gun and her famous crossbow. She will also have her own co-op partner like the rest of the campaign.

the question is , who is ada's partner?
Although nothing has been  confirmed yet, resident evil 6 demo reveals a promising feature on ada's campaign.