Personality Testing Ground

The human brain is a very mysterious, organized and disciplined human organ that determines your thoughts, personality and behavior. And personality, that is, personality, is an important characteristic that reflects individual differences. We often say that we are becoming less and less like ourselves, so is it an illusion or is our personality really in the process of being replaced? If the dream is a big trial ground, and each character appearing in the dream is a potential personality, and they are all trying to compete for the position of the main character, then what will it look like?