If Renji had previously thought that Suthia's corruption in the Dream was exaggerated, a deliberate act by the dark-skinned elf behind the scenes, now he was shaken.
Regarding the Dream's ability to reconstruct characters' past experiences in the form of a "dream within a dream," Renji had no doubts about its authenticity. After all, Zero had used a similar "data reshaping" ability at the Sea Sand Bar, reproducing everything that had happened there.
As long as there was sufficient data collected, matched with the necessary computing power, both the past and the future could be extrapolated by intelligent machinery.
Renji initially re-entered the Dream just intending to find a bit of information about Suthia. Now, he found it hard to imagine her current mental state.