>>533330217
Sayaka's sanity loss also causes her to see what others can't including a ''Ghost that is coming back'' with the design of the same coat the Nolan sisters wore in their bodies in the hgiher world and the eyes of both of them among other elements. Sayaka can talk with the God of Death - a trait the Ludens like Alice in DERQ1 could, which in turn can be an indicator to what they are, and what the Nolans became after they were killed in the True End of DERQ2
A good setup again, as the events of DERQ2 always felt too detached from the plot of DERQ1, but here we see it will have its impact.