ISFJ is one of the sixteen personality types identified by the Myers-Briggs Type Indicator (MBTI). It stands for Introverted, Sensing, Feeling, and Judging. ISFJs are known for their caring and responsible nature, and they make up about 13% of the population.

Here is a detailed description of ISFJ personality traits:

1. Introverted (I): ISFJs are introverted individuals who gain energy from spending time alone or in small groups. They tend to be reserved and prefer to think before speaking. They may need time alone to recharge and process their thoughts and emotions.

2. Sensing (S): ISFJs are observant and detail-oriented. They rely on their five senses to gather information and focus on the present moment. They have a practical approach to life and prefer to deal with concrete facts and details rather than abstract concepts.

3. Feeling (F): ISFJs are empathetic and considerate individuals who make decisions based on their values and emotions. They are highly attuned to the feelings of others and strive to maintain harmony in their relationships. They prioritize the needs of others and are often seen as warm and nurturing.

4. Judging (J): ISFJs are organized and structured individuals who prefer a planned and orderly lifestyle. They like to have a clear framework and tend to be responsible and reliable. They value stability and prefer to follow established rules and traditions.

5. Caring and Supportive: ISFJs are known for their caring and supportive nature. They genuinely care about the well-being of others and often put the needs of others before their own. They are attentive listeners and are always ready to offer a helping hand or provide emotional support.

6. Detail-oriented: ISFJs have a keen eye for detail and are highly observant. They notice small details that others may overlook and use this information to make informed decisions. They have a practical approach to problem-solving and prefer to focus on the specifics rather than abstract theories.

7. Loyal and Dependable: ISFJs are extremely loyal and committed individuals. They value long-term relationships and are dedicated to their friends, family, and work. They take their commitments seriously and can be relied upon to fulfill their responsibilities.

8. Reserved and Private: ISFJs tend to be reserved and private individuals. They may take time to open up to others and prefer to keep their personal lives private. They value their personal space and may find it challenging to share their thoughts and emotions openly.

9. Conscientious and Responsible: ISFJs are conscientious individuals who take their responsibilities seriously. They have a strong work ethic and strive for excellence in everything they do. They are dependable and can be counted on to complete tasks efficiently and effectively.

10. Traditional and Respectful: ISFJs value tradition and respect established norms and customs. They have a deep respect for authority and tend to follow rules and regulations. They appreciate stability and may be resistant to change unless they see a clear benefit.

Overall, ISFJs are caring, responsible, and detail-oriented individuals who value stability and harmony. They are dedicated to their relationships and take their commitments seriously.