Well, if Asakura finds out that Haruhi knows what she is, that may make her all the more dangerous. At least at the moment, she's lying low.

['And yes, we're skipping all the parts about why Asakura's interested in her, what Haruhi knowing might do to the world, etc. etc. But it seems like Rockbell's not entirely unfamiliar with that... once again. That or she's taking it well in stride.']