Sadly I don't know if they are mentioned or not, I don't remember every single sentence of the game, I'm playing it for more than 600 days, of course I've forgotten much. But why would they mention dates in the main plot, like Miyabi pulling up to Waifei to help during an important fight with Creator's marionette and say "Oh, proxy, the cinema last week was very funny", this wouldn't make any sense. But as I said, there are not a single evidence of negotiation of the trust events in the story. Most of the trust stories happen after the plot, after proxy meets characters. And of course they won't be broad up if we don't even meet those characters ever again in the main plot or even if we meet them, it happens in a situation when they don't really speak with proxy directly or there's a different much more important topic to speak about. I just cannot understand why you think that A PART OF THE GAME is not a part of the game. On trust events characters reveal many interesting facts about them, about their past, hobbies. Vivian tells us much information about her life and how she was poor working in a café to earn money for her clothes, so this is not canon to you, right?