Phooey. The mod ruins your big reveal, so you get to ruin mine? I see how it works.
Anyway,
Lommy had it correct.
Nerwen was killed because the wolves
failed to kill her on the previous Night.

I didn't protect anyone last Night on purpose - I had realized that
G55 was probably the Seer, but was pretty certain the wolves would go after
Nerwen again; if I protected
G55 and the wolves killed
Nerwen as I suspected they would, I wouldn't be able to protect her toNight.
G55 revealing
Inzilawolf wraps things up nicely, though.
++Inzil