I contributed to the round robin though, I guess I'm one of the 'various posters'.

See here and here (Salieri Meng's first appearance - though it was Shrike who named him), and here and here for examples.

It was a fun time.

I've never thought the compilation of the Round Robin chapter #5 you have linked has collected it all fully to be honest. There are bits missing.

EDIT AFTER POSTING: I've collected the full chapter now and reposted it, colour-coded for authorship. If you like you can update the link you are using for #5 to that one.