What do these have to do with rationality? Why would you exert time and energy conjuring up a false persona and deluding yourself into believing it has autonomy when the end result is something that if revealed to other people would make them concerned about your mental well-being, which is likely to negatively impact your goals?
Having an imaginary friend is irrational behaviour and the topic is damaging by association. Surely there are more suitable places to discuss this.
...just to be clear on this, you have a persistent hallucination who follows you around and offers you rationality advice and points out fallacies in your thinking?
If I ever go insane, I hope it's like this.
Yes.