If you’ve met Primadonna but haven’t completed her battle yet, your play through still has (in order, because of how you answered the opening questions):
-Defeat colossus (P’s boss)
-Unwind with P by talking to her after beating colossus
-Meet Lilith (game automatically brings you to her after beating either boss)
-Return to Quentin and beat her boss, Depth Knell
-Unwind with Quentin by talking to her after beating her boss
-Meet Isaac
-Final decision
The average player takes about 2-3 hours to complete the entire demo ^^