Ren is not disclosing a lot of information. He will share that Heavenly Blanc holds resemblance to the cafe he worked at back home - LeBlanc.

As for theories, he will say it feels like it's pulling from their memories/psychology/experience and meshing together the bits that seem to make sense for whatever reason, but won't go too further on that either. He will be against the simulation theory if it is disclosed by void friends.