I didn't test the text files because the file names got corrupted on my end, but everything else ran fine in game. Looking at the text files, it looks like m/GameData.txt and m/GMap.txt were never compressed back into .bin.lz form. Running them through FEAT again fixed the issue. I'll go ahead and include the recompressed versions below if you want to try adding those to your patch.
I'd go ahead and add those back in and see how things run. If you removed those files from a romfs before modifying them, then the crash likely occurred because the game couldn't find them in the modified romfs. If that's the case, then using the recompressed files should fix the issues.
I was planning to swap around which child is assigned to which parent. Tying multiple children to the same parent could be done, but I'd rather not mess with that right now. If you want to get both Kanas though, I think that
@DeathChaos25 put together a patch which gives you both of them at the end of Paralogue 2.