@Frank Apisa,
It doesn't matter, it's in your mind so they are all you, but with different inclinations.
I used to love a series of advertisements for Allianz Insurance, which was set up "inside the head of Claude". Different actors played different character traits like optimism, pessimism, stupidity, cynicism, fear, dynamism, libido, etc. debating in a conference room (=conscience). Charlotte Rampling, playing reason, was always ending the discussion with some sort of decision in favor of going for an Allianz insurance product or another. E.g.:
Joke aside, it works a little bit like that, I think.