If public face includes being Justice League liason, I'd say Cell because of her demeanor. Otherwise I'd say Amazon, because of his charisma and comfort with the English language, while not a big deal OOC, may be a bit odd In Character for the American public to be addressed by her. But I totally see her as the supreme choice in terms of who should communicate between the teens and adults.

Pistolera should easily be a field leader [B]and[/B] prepatory analyzer person. Agreed, she's the Batman. Really I should just say I'm curious where Sam's taking her. In case of her downfall, I suggest Rufus take charge.