Is there any point where we can have some item are effect, that let's us stay sentient as their fat. And then just decide when to go to the other world? Would be a super cool concept
Next update allows for modded content! You can make it! You could add any character, any place. If not you, then others will.
Modding renpy games is already dirt easy. I have even made a mod for an older version of this game to fix a couple small bugs.