Questions from y not:
“Put simply: who is in charge here?”
Gandhabba is ALWAYS in charge.
“Does the gandhabba in any way have influence over the decisions taken by the brain?”
Gandhabba MAKES decisions and those orders are carried out by the brain. However, the gandhabba gets information about the external VIA THE BRAIN. So, if the brain does not function well (due to brain damage or even via influenced by drinking/drugs), then the gandhabba will get “bad information” and make bad decisions.
– This is an important point to understand. It is discussed in those posts; there are several related posts. I suggest to do a search on “gandhabba” and read all of them. It is complex issue.
“.Does it follow that the gandhabba is the one NOT making you type or speak when you are weighing the pro and cons.”
The critical point to understand is YOU are the same as GANDHABBA, the mental body. The physical body is just a “temporary housing”. Again, these issues could be resolved by reading all those posts at the website. Of course, ask questions if an explanation in a given post is not clear. But one needs to go through those posts. It is NOT possible to explain things in a single post.
There are two main sections on gandhabba:
“Mental Body – Gandhabba” and “Gandhabba (Manomaya Kaya)“.
I would start with those. There are other posts in other sections too, but that is a good start.