Therefore, I assume that we will also see one or two characters from Interlude in BaDIK.
Uh. I don't know about everyone else but I'd rather the Interlude characters not show up in the main game. It just sounds kind of contrived and DPC already has a huge cast of characters to handle.
Those characters seemed to only have been written to provide more depth to Zoey's introduction. Their stories were also pretty much wrapped up by the end and it didn't really look like there'd be any reason to suddenly leave San Diego and suddenly show up wherever MC and Zoey are now. Unless it was something sudden and life-altering but also something Zoey could do about (whether consoling or actively help). Which is why it'd be really contrived to have them come back.
Even if DPC does another ass pull like that, what purpose does that serve? They're support characters of someone who you can't even pursue yet. Which means they're tertiary characters at best. Or secondary characters of a secondary character at worst. They have nothing to do with the MC or anyone at the school. BADIK is MC's story, not Zoey's. At best, you could say that one cluck post he saw was because of that one jealous tattoo woman but that's not really something that needs a reapperance to address and it'd just be another stupid subplot no one asked for if she did show back up.
Not
everything needs to be interconnected. Just let DPC take the "L" on the Interlude and pray that he doesn't make one about Madame.