The cognitive functions all have common connections to popular archetypes and ideas and figures we can all see clearly in our minds. I've brushed upon this many times before, but let's get into it for reals.
The Sixteen Archetypes
The Reporter (FP)
You'll find these people to be open to opinions and eager to hear your stories and explanations. What do you think and what's your life like? What's behind "you"? What do you mean and what are your intentions?
The Architect (TJ)
You'll find this person to be serious, rigorous, and thorough. They never forget to account for data and for information and they tend to look at the situation objectively. They're often ambitious types.
The Organisers (SJ)
These timely and neat individuals have a great sense of rhythm and timing. They're good at organising their environment and sensory information in detail and they have a strong sense of order.
The Detectives (EN)
You'll find these people to be opportunistic and quick to seize a new chance when it appears. They've got a good grasp of what is possible and they're always on top of new trends and patterns. Curious, open-minded, and skilled at reading behind the lines.
The Pragmatic (ET)
These types know what is smart and what's a good choice. They see what works and what doesn't work, and they notice what strategies tend to give the best results. Often tough, assertive, and confident types.
The Diplomats (FJ)
These types are typically vocal and expressive. They're aware of code of conduct and of how to express themselves and they live by strong ideals and a sense of ideology. Often goofy, friendly, and diplomatic types.
The Scouts (ES)
A scout is always ready. Energetic and attentive, these types rarely miss what's going on in front of them. They know their environment and what is happening around them better than anyone and have a solid sense of balance and of their physical surroundings.
The Instructors (IS)
The instructors have a solid grasp of their history and of details and information in the past other's might miss or forget. The instructors remember accurately and in detail and know how to use past information to understand and explain what is happening around them.
The Hackers (TP)
A hacker is good at understanding codes and data around them. They can quickly figure out your strategy and how you work and they can efficiently think of counter-moves and ways to stay ahead of your every move.
The Philosopher (IN)
A philosopher is skilled at closing their eyes and envisioning a world of ideas and possibilities. They can, from this world, theorise and deduce information about their surroundings.
The Critic (IT)
A critic is attentive to how things work and what appears efficient and what appears to be inefficient. They see and understand what gave you the results you got and how you became successful at something and they can spot what you're doing wrong and how you can improve at a task.
The Promoter (EF)
A promoter is generally well-dressed, and of good character and virtue. A promoter has things they like and dislike that they like to promote and reward. They often support charities, events, and spread their reviews and opinions about things around them freely.
The Counsellor (IF)
A counsellor is aware of your hidden intentions and has a high understanding of why people act the way they do and what meaning lies behind an action or a situation. A counsellor will listen to and ask you questions about why things happen, and will generally be very understanding.
The Naturals (SP)
A natural is typically naturally talented and able to intuitively and through their strong instincts figure out how to manage any situation or environment. They adapt easily to new environments and are good at thinking on their feet.
The Speculant (NJ)
This type is able to weigh together patterns and to scheme and envision a future or a possibility. They like plotting a course or seeing what may happen next and they like thinking about how to make an idea a reality.
The Catalysts (NP)
You'll find a catalyst to be curious, inquisitive, and creative. These types are skilled at thinking their way around a problem or finding unusual ways to solve problems. They're good at seeing different ways to interpret a situation.
These are archetypes that represent people's nature. If you explore the Enneagram, you will also encounter archetypes that function as personas. A persona is something we can put on or act like, for example a Ruler (8), a Caregiver (2) or a Performer (3).