ISFJ

ISFJs lead with Introverted Sensing (Si), which is awareness of their own health and well being and what  is comfortable and natural to the ISFJ, and compels them to establish comfortable routines and usually to  be good at noticing their own physical needs. It also inclines them to details and to prefer what is customary  and conventional (relative to their own background and experiences). They are willing to change their ways,  but they prefer to do so slowly and at a conservative pace, and they are inclined to rote learning and  specialization. 

Their auxiliary function is Extraverted Feeling (Fe), which means they gain extra energy from the feelings  of other people and are inclined to notice, manage and absorb the emotions and values of those around  them. They are socially aware creatures who can get energized by interaction and may ignore their own  logic and feelings for the sake of group harmony or inter-group diplomacy, as well as guiding others to  desired results.  

Their tertiary function is Introverted Thinking (Ti), which is their developing desire to be logical and  consistent. ISFJs can enjoy solving puzzles, engaging in critical thinking, and pondering the deeper  meanings of life using logic and reasoning. They may find they find it easier to take emotions out of the  equation in their decision making as they mature, though will rarely be wholly comfortable with this. 

Their inferior function is Extraverted Intuition (Ne), which is their hidden desire for novelty and to explore  alternate possibilities. ISFJs typically settle into comfortable routines, but part of them will desire to take  breaks from this tendency and to try something different and new for its own sake. They generally prefer  this in small doses and too much chaos can reinforce their need for security through customs and traditions,  but they appreciate those who can help them enjoy life more without making them feel like the ground is  opening up beneath their feet.  

ISFJs are known for their meticulous attention to detail, reliability, and a strong sense of duty. They are the  ones who remember birthdays, anniversaries, and the little things that matter to people. With a natural  inclination towards caring for others, they often find themselves in nurturing roles, whether professionally,  as in healthcare and education, or in their personal lives.
 

Loyal and considerate, ISFJs work diligently behind the scenes to support their loved ones and maintain  stability in their environments. They are adept at creating order and structure, and they take great pride in  ensuring that their tasks are completed with a high degree of thoroughness and efficiency. 

ISFJs are not typically ones to seek the spotlight, preferring instead to contribute in ways that are meaningful  but often go unnoticed. They derive a great deal of satisfaction from knowing they have helped make  someone’s life a little easier or more pleasant. 

While they are conservative in their actions, preferring tried and true methods over untested ideas, ISFJs  have a depth of understanding and compassion that makes them invaluable in times of need. They are quick  to listen and slow to judge, always aiming to provide a sympathetic ear and a helping hand.