Its propably no feasable to train your own ai for that at least at this point in time. Consider all the crawling of the internet you would have to do to train the model enough so it has enough material for natural speech and millions of options to respond in a proper way. Also the cost it brings to maintain and implement the ai as well.
If you play the new divinity, there has to be a way to get the AI API of the Larian Server kind of like claude code and the likes, meaning it would not work, if you wanted to play the game offline. And deploying the ai directly onto the users hardware would be a desaster for performance.
