Lina's Nerve persists throughout different runs, though you've probably noticed that. And it is gained by Lina peeping on you as you do various things. So for the list of scenes that have Nerve in it:
ok so i noticed what the problem was, i'd unlocked all scenes and all corruption by the debug cheat, but then used the debug cheat to reset lina to only corruption 2, so nerve was unlocked but not showing up in the reunion. mistake on my part
