User blog comment:Bluequartzdragon/Salamat Pagi!!/@comment-36111607-20190203043225/@comment-34667623-20190206214151

Well, I think there was one in Shirobako, but it was tiny... Terribly tiny... I don't remember which episode, but I happened to be looking in the bottom left had corner and there was a mini reference. Other than that, Helvetica Standard has some chapters about the characters sometimes, that robot company someone covered (it may have been you) that had a crossover with them, and that's it.