[His eyebrows raise, because Hijikata's first understanding of Juvia's comment is that she feels inadequate. Which is completely off base, so far as he's concerned - she's one of the more capable, more responsible officers he's worked with.

But he can see something more working its way through her mind, and he keeps his reassurance to himself.

Maybe she meant something emotional? He's realizing he has no idea-

So he'll quickly speak to what he does know, though with a bit of bending.] Uh, it's not that I know exactly. [Yes he does.] I've just heard other officers talking.

They've been running this training for a while now. Can't be too hard, even if it's designed to be frustrating. [Maybe he's speaking just a little too fast to sound entirely credible, but he's gesturing for her to follow him aboard the ship, hopefully distracting from any questions with the pre-launch routine.]