Wasn't sure where else to ask, and I am fully aware the answer may be an "I don't know" but where might I find the .json files for characters on Linux? I've done my own sleuthing and found nothing, so I'm posting here in case anyone else might know
If you're using Wine or similar, it probably maps the AppData folder somewhere. Then it's AppData\Roaming\Godot\app_userdata\Battlefuck Pit\Characters\
From a quick search, for Wine it's probably in ~/.wine/drive_c/users/[your_user]/Local Settings/Application Data