Mara, too, was somewhat puzzled by the secrecy and mention of codenames.  Though she didn't have any idea of the reason for codenames, the general air of secrecy reminded her of childhood in the tunnels of the drow, where no one was forward about anything, even within one's clan, let alone among outsiders.  The feel of those memories automatically put her somewhat on edge, remembering the constant suspicion and backstabbing.