I already figured it out on my own the same day as I asked you since you didn't answer quickly and I couldn't wait to continue the game so I searched "how to edit RPG Maker saves" and easily found what I was looking for, I had reached Chapter 5 but I reloaded the game from the end of Chapter 3 since my playthrough of Chapter 4 was so frustratingly disappointing because SierraLee is a hypocrite who mocks RPGs standards to buy relationship scores with meaningless gifts whereas he designed The Last Sovereign to depend entirely on insanely expensive investments which begs the player to cheat to actually get enough ProN to invest since he utterly unbalanced the game between costs and profits as in the investments don't even repay their costs so all of them are actually losses of funds instead of being profitable and I grew so fed up of this unbalance and shitty capitalistic design centering the whole game around investments that I decided to cheat his shitty design to rebalance the game by myself.
I am not even interested in maxing anything, I merely needed to give myself enough ProN to invest in everything and therefore get the investments obstacles out of the way of the game and you know what? Even with owning everything in the world, you still don't get enough profit to repay your costs which demonstrates that the investments are actually losses and that SierraLee purposefully unbalanced the game to make it artificially hard in a lazy way and he sabotaged his own game because it actually becomes more enjoyable once you get the investments out of the way.
The only other variable that I cheated is Sarai's influence during the Council of Gawnfall which SierraLee basically designed as a cycle of investments replacing ProN with Points of Influence to invest in votes instead of business which is why I hate this part of the game because it is actually a round of investments which pretends to not be a round of investments and which requires cheating the same way as all other investments require to get all of these lazy artificial obstacles out of the way of enjoying the game.
Actually, I invite you to read my review of the game because I have so much more to say about it which got me banned from the game's page but SierraLee can't delete reviews. 😉