After he was freed from the tiny room and got settled in, he scanned through the journal entries in his CiD, not enough to get a huge about of information, but enough to find out about the party. Normally he wouldn't have gone, but he saw it was mentioned that it was after this that they'd be getting something to put outside the door, and that otherwise the cats and rats would do as they pleased with the giving and taking away of things.

He was a king cobra in snake form, and as such usually ate other snakes, but when snakes weren't available he could eat other prey as well, and in the current situation, rats would have to do. That meant, of course, he didn't want anything to be at the rats' discretion, so he figured it would be best to show up, get a fish to put out for the cats, and ensure the rats wouldn't be running off with a kidney or something.

Until then, he'd sit in a corner, eating and drinking nothing, waiting for the party to be over.