The third rarest personality type is the INFJ, also known as the “Advocate.” INFJs make up only 1.5% of the population, making them the third rarest personality type. INFJs are characterized by their introversion, intuition, feeling, and judgment. They are highly creative and often have a deep understanding of complex issues. INFJs are compassionate and empathetic, often taking on the burdens of others. They are devoted to their beliefs and values, and strive to make the world a better place. INFJs are often artistic and have a profound ability to connect with others. They can be private and reserved, often keeping their thoughts and feelings to themselves.