I'm not sure who could do it, but a more hacker-type character from Niflheim could screw the system up for fun. Like, say, Light or Mello use the computer to have what LOOKS like the characer's reply to try and corner an Asgardian or two alone.
Then, if you want the rescue to go uninterrupted and the hacker character is willing, they could manage to slip in and out undetected or whatever you guys want.
Otherwise, worst case? Lucifer could threaten Frank. Maybe he wants to see what kind of chaos'll happen (if any), and tells Frank that if he tries to tell others then he WILL find Glitch and hurt him, but if he's willing to come alone, well...