The ship when it comes is nothing at all like the ocean-going ships Sasuke and Hashirama will be familiar with. It's enclosed entirely, for one, the main body shaped like an enormous teardrop with fans trailing from the long end. It hovers in the sky far above, not landing, and from it a smaller ship, this one more bird-like (inasmuch as it has two motile wings and a distinct body), comes and lands before them, settling its wings not folded but at an angle to the sun, revealing shining panels embedded in the white surface.
A hatch opens on the front, and three people step out. One, in the center-front, could be an Uchiha from her coloration, and looks unsettlingly familiar to Sasuke. The two following her are less central for the Land of Fire - one, a man, has darker skin than even the people of the Land of Lightning, and wears his curly hair short. The other, a woman, is pale, with blonde hair bound into a tight bun at the base of her neck. All three wear similar clothes, likely a uniform, distinguished primarily by small details in decoration.
The woman in front speaks briefly to Sasuke and Hashirama's hosts, then introduces herself through Spark. Her name's Chika Nakano (given name listed first), her rank is Captain, and her ship is the Venture. They have translation software, and their machine will be able to analyze the language Hashirama and Sasuke speak and provide a translation back and forth, given enough input.