I would suggest a few things. First off, a virus scan, because viruses can cause a mass variety of issues. If nothing comes up then I would suggest you completely erasing Feral Heart from your computer and then reinstalling it. Just a simple uninstall doesn't get rid of all of the files, you have to uninstall it and then get rid of all of the files associated with Feral Heart, then you can reinstall the game. (You can back up files in other folders to put in later if you have presets or items/markings you want to keep) If this doesn't work then it most likely has to do with the permissions involved in your computer, whether it be an anti-virus software messing with it or something else. However from the fact you can't see any of your characters, I think it's safe to assume your files have been messed with and a complete refresh for Feral Heart is needed.
This is only in case what Hakumi suggested doesn't work. Otherwise resetting home and sending them home might be the answer to your problem.