Wait, wasn't Shayuu created by the Demon Lord?
No, shayuu is basically a genetically engineered person using the demon lord as base (fight fire with fire kind of thought), so that's why the demon lord considers her his daughter, and Dr sugoigoi, as the creator is also her parent. Also, remember that because she was made in a lab she is 5 years old iirc









It would be so interesting if Guwon also retained his memories from the past run
Or maybe he knows about all the past runs that is why he is so detached from reality
I'm pretty sure most if not all the people are retaining memories subconsciously, which would explain many of the continuous behaviors seen throughout.