ISFJ

The ISFJ personality type is one of the 16 personality types described by Isabel Briggs-Myers and Katherine Cook Briggs, and stands for Introversion, Sensing, Feeling, Judging.

Jung's Analysis
Carl Jung had first categorized his subjects as leading from one of four separate axioms of being: Thinking, Feeling, Sensation, Intuition, and paired this with their preference for either Extroversion or '''Introversion. '''

In the case of both the ISFJ and ISTJ, Jung would have characterized this type as having dominant Introverted Sensation (Si), which is primarily characterized by an adherence to responsibility and what has been proven true by time.

Personality Basics
ISFJs are primarily characterized as responsible, caring, traditional, and kind.

Famous ISFJs
Fictional
 * Mark Hammil
 * Gary Oldman
 * Rand Paul
 * Sam Smith
 * Ann Perkins (Parks And Recreation)