One more FFXIII party character to reveal?

You can find relevant information in the unlikeliest of places. So, recently, if you've been following the news out of the Final Fantasy XIII Premiere Party, you may have caught the announcement of "Elixir", a Final Fantasy XIII take on the Final Fantasy Potion from the Final Fantasy XII release. (See: crazy Japan.) Suntory, the manufacturer of both Potion and the new Elixir, has been updating their online listings for the beverage. Now, in one of these pics that Suntory provided we see five characters that have been revealed thus far: Lightning, Snow, Vanille, Sazh, and Hope. However a sixth slot has a question mark. Will this be the sixth and final party member to be playable as a part of the main team?

SOURCES: FF7AC Reunion, country food