Determining the rarest MBTI (Myers-Briggs Type Indicator) type for females can be subjective as it depends on various factors such as cultural, societal, and individual preferences. However, based on statistical data and general observations, the INFJ (Introverted, Intuitive, Feeling, Judging) type is often considered one of the rarest for females.

INFJ females are estimated to make up only about 1-3% of the general population, which contributes to their rarity. Here is a detailed description of the INFJ type:

1. Introverted (I): INFJ females tend to be introspective and gain energy from spending time alone. They often prefer deep, meaningful conversations and introspection over socializing in large groups.

2. Intuitive (N): INFJ females rely on intuition and are more focused on the big picture rather than the details. They are imaginative, future-oriented, and often have a strong sense of intuition and gut feelings.

3. Feeling (F): INFJ females prioritize emotions and values when making decisions. They are empathetic, compassionate, and highly attuned to the emotions of others. They often strive for harmony and seek to understand different perspectives.

4. Judging (J): INFJ females prefer structure and organization. They are often goal-oriented, decisive, and prefer to plan ahead. They have a strong desire for closure and tend to be responsible and reliable.

INFJ females are known for their unique qualities and strengths, such as:

1. Deep empathy: INFJ females have a remarkable ability to understand and connect with others on an emotional level. They are often seen as compassionate listeners and are highly attuned to the needs and feelings of those around them.

2. Insightful and visionary: INFJ females possess a strong intuition that allows them to see patterns and possibilities that others may overlook. They often have a deep understanding of human behavior and can envision future outcomes.

3. Idealistic and values-driven: INFJ females are driven by their core values and principles. They strive for authenticity, integrity, and fairness in their personal and professional lives. They are often passionate about making a positive impact on the world.

4. Creative and expressive: INFJ females often have a rich inner world and a vivid imagination. They may express their creativity through various outlets such as writing, art, or music.

It's important to note that while INFJ females may be considered rare, every individual is unique, and MBTI types should not be used as a definitive measure of personality or capabilities.