Just something I can do doesn't feel like much of an explanation, but if he can't or won't explain any further, Tsukuyo doesn't have any choice but to accept that. As long as he doesn't get violent, it's none of her business what he does and what he's capable of, anyway.

"Something like that." She takes a moment to look at the ships rather than him, as if confessing to the truth of that statement - nevermind that she kept it as vague as possible, half because there's no need to share information without a reason - something like an safety measure - and half because she's a private person by nature anyway. "How about you?"