INFJ is one of the sixteen personality types identified by the Myers-Briggs Type Indicator (MBTI). What makes INFJ unique is a combination of their cognitive functions, values, and characteristics. Here is a detailed description of what sets INFJs apart:

1. Introverted Intuition (Ni): INFJs have a dominant function of introverted intuition, which allows them to deeply understand patterns, connections, and possibilities. They have a natural ability to see the big picture and anticipate future outcomes.

2. Extraverted Feeling (Fe): INFJs also possess extraverted feeling as their auxiliary function, which makes them highly empathetic and attuned to the emotions and needs of others. They are skilled at understanding and responding to the feelings of those around them.

3. Empathy and Compassion: INFJs are known for their deep empathy and compassion towards others. They genuinely care about people and are often driven by a desire to help and make a positive impact in the world. They are excellent listeners and are often sought out for their understanding and support.

4. Idealism and Vision: INFJs have a strong sense of idealism and a vision for a better future. They are driven by their values and strive to align their actions with their principles. They often have a clear sense of purpose and are motivated to make a difference in the lives of others.

5. Insightful and Perceptive: INFJs have a keen ability to understand people and situations. They can quickly pick up on subtle cues and underlying motivations, making them excellent judges of character. They often have a deep understanding of human nature and can see through facades.

6. Private and Reserved: INFJs tend to be private individuals who value their inner world. They may appear reserved or introverted, as they require time alone to recharge and process their thoughts and emotions. They often have a rich inner life and enjoy introspection and reflection.

7. Creativity and Imagination: INFJs often possess a strong sense of creativity and imagination. They enjoy exploring ideas, possibilities, and different perspectives. They may express their creativity through various outlets such as writing, art, or music.

8. Long-term Thinkers: INFJs are future-oriented and tend to think in terms of long-term goals and plans. They are strategic thinkers who consider the broader implications of their actions. They often have a clear vision of what they want to achieve and work diligently towards it.

9. Altruistic and Selfless: INFJs are known for their selflessness and willingness to put others' needs before their own. They derive great satisfaction from helping others and often find fulfillment in acts of service. They are natural caregivers and are deeply committed to the well-being of those they care about.

Overall, INFJs are unique in their ability to combine deep insight, empathy, and idealism. They possess a rare combination of intuition, compassion, and vision, which sets them apart from other personality types.