The LII socionic type, also known as INTj in the Myers-Briggs Type Indicator (MBTI) system, stands for Logical-Intuitive Introvert. This type belongs to the Rational Quadra and is characterized by their logical and analytical thinking, introverted nature, and intuitive perception. LIIs are highly intellectual individuals who value knowledge, analysis, and precision. They are often seen as insightful, deep thinkers who excel in abstract reasoning and problem-solving. Their intuitive perception allows them to make connections between seemingly unrelated concepts, contributing to their creative problem-solving abilities. Being introverted, LIIs tend to be reserved and prefer spending time alone or with a small group of close friends. They are independent thinkers who value their personal space and time for reflection. LIIs are often motivated by their inner world of ideas, theories, and concepts.

In social situations, LIIs may come across as reserved or distant, but once they open up, they can engage in deep and meaningful conversations. They have a strong sense of integrity, and their decisions are driven by logical analysis rather than emotions. Overall, the LII socionic type represents an individual who possesses a sharp intellect, an analytical mindset, and a deep interest in theoretical concepts.