This project in particular has been particularly frustrating. I'm trying to find a way to extract the textures and models from these files, which are pretty clearly specific for each character in the game, with some rather random organization with specific names somewhat blending english and japanese names between them. I have here a selection of them, which I believe are some Boss NPCs from said game. There is a specific one I am looking for and the only way to assure I'll find it is if someone manages to figure out a proper extractor/converter for the models and textures. The FSYS files contain both.
https://www.dropbox.com/s/ff2dexthh46pzbi/fsys.zip?dl=0