Crossword puzzle: LessWrong Halloween 2022

That was fun. I did indeed need to consult the Wisdom of the Internet a few times, in almost every case because I am either insufficiently American or insufficiently Japanese.

[EDITED to add:] For calibration, I reckon it took me about 20 minutes, but I wasn't actually timing. I'm more likely to have underestimated the time than to have overestimated it.

At last I solved it! From the perspective of someone who doesn't usually do crosswords: this was quite difficult. I did have to resort to Wikipedia-ing and (in some way worse) Googling for many of them, but it was fun.

ROT13 of my solutions that the website in the original post will accept as input to the "Save/Load" button after decoding:

NJR ZON EGY QBTR NFPU/SNA BEQ NBV NANF PUNV/NTV YVM FBA OBYGMZNAA/ERQOBAR ZYX   OUB ZBQ/   HPT GHN FVZVRFDHR /CREGU ONFVYVFX GRH   /RYNY  EZF RZZL RENTBA/REARF RER QHNY   ABAB/GVNEN RVA  YVR NQGRPU/NPGVAVQR TBNY NEBHFR /   NPPRYRENGVBAVFZ   / PNAGBE ZVGR ZNANGRRF/ENVWVA VOZ  ZNY TBYQN/FVEV   ANQN NZL REYVX/VELUBE GERK EBM  ZVPR/   NAR RTERTBER MRFGF/ ERQRIRYBC BAV GBA   /VNA NVY   JRV FVZGBJA/FVATYRGBA NQG NYO CBR/VFRR JBER YRR ERV NXN/FRNZ FABB GYF VQR YRG
 

Fairly confident after filling it all in (with gradually increasing amounts of googling as it went on)

With the exception that I have answers for 79 and 102 across, by virtue of everything around them being filled in and making sense together, but it's not a nightmare-haunting character or a synonym for "afflict" that I recognise.