>Well, that's one of the perils of trying to go undercover when you
>don't have the slightest idea how to interact with... anyone. I mean,
>look at Takao's little trip to the bookstore early in the anime. The
>only reasons that worked at all were that a) it only took her a few
>minutes and b) Not Iona had the courtesy to wait until she left the
>store to troll her. :)

Gunzou's mother figured Takao out right from the start, but then again she's pretty much stated to be a fairly smart woman in her own right.

>(And Haruna and Kirishima... well, they're just
>idiots.)

Haruharu's problem is she has even more trouble expressing emotions than Kaga does, while Kirishima gets a pass because she's a chibi in a bear suit.

On the other hand, Zuikaku seems to have gone totally native, while we know that Yamato's alter-ego managed to pass for a good long while as human before she disappeared. And I-402 appears able to pass as human at least enough not to have tripped any alarms.