On pages 141 and 144 we have the following:
QL440-52.1 – or Quell – is one of the few N-9s at Wallace Corp honored with a name, ranking her among the untouchable “angels” in Niander Wallace’s Dix Huit inner circle who have achieved a rare level of perfection that even Niander deemed satisfactory.
Senior Tyrell staff whisper that Eldon Tyrell had dedicated his last few years to a secret research project entrusted only to his Deux Hait inner circle.
I was not familiar with these "Inner Circle" references. Are they from some existing Blade Runner content, or newly developed for the TTRPG?