He's going to go out on a limb and guess that it's a mecha, not that it matters - what he wants to get a chance to assess is how useful it's going to be in the kinds of situations they're likely to come up against. "You know, this ship has some pretty sophisticated virtual reality suites - if your Eva made it here, its specs should already be in the system." And if not, Stacy would be able to tease a fair approximation of it out of Asuka's memories. "Maybe you could give me a demonstration of how it works?"