What is the mod of fart effect

Gas Particle

but where do i download it from?

try (https://sideload.betterrepack.com/download/KKEC/Sideloader%20Modpack%20-%20Studio/nashi/%5bnashi%5dStudio%20Map.zipmod)if not I will find that later

It did not work for me, when I opened Chara Studio I did not appear and I was too slow

And also that was not the mod

https://sideload.betterrepack.com/download/KKEC/Sideloader%20Modpack%20-%20Studio/RSkoi/%5bRSkoi%5dStudio%20Particle%20Effects%20v1.0.0.zipmod

try this this should work now

Thank you

Could you make Rafaela Itseki, Yukina Itseki and Aubrey Itseki for the base game?

yes