if you're looking for the mod where someone added a character to monster mind -- they posted it to the discord server
https://discord.gg/ycf6Jzu
here is the message link
https://ptb.discord.com/channels/441368427295145985/441387973754486795/135813357...
they recommend you back up your saves and passwords, but it should just work, and it does 99% of the time. i haven't tried it out, but other people say it worked!