Lee Kyu-jin MBTI -Persönlichkeitstyp
Persönlichkeit
"Welcher Persönlichkeitstyp ist {profilename}? {profilename} ist ein {MBTI} -Persönlichkeitstyp in MBTI, {enneagram} - {iv} - {tritype} in EnneArgram, {big5} in Big 5, {socionics} in Socionics."
I think ESTP fits more. Just as a few comments below discussed, he is pretty impulsive and blindly trusts Joo Dan Tae and the others out of greed. He has very low Ni. And now for whether he is an Fi user or a Ti user, I think he fits the Ti-Fe axis much better. *Spoliers below* For example when Oh Yoon Hee (a strong Fe user) tried to manipulate him, he is easily won over by her. This indicates both lack of search for intention (Ni) and her affection (Fe). Another example of his tertiary Fe is his lack of tact at times. This paired with low Ni, constantly makes Joo Dan Tae overpower him although Kyu Jin tried to hold a few cards against him. Towards the third season, I think he starts using a little bit of his Ti+Ni (although it isn't half as mature as a strong Ni+Ti user). For example, when Oh Yoon He died, many were quick to believe whatever the news outlets released. Even his wife (low Ti) started believing them. But he eliminated any sort of external logic (no Te) and found something odd about it. He was also right about who benefitted the most from her death and they indeed where the real culprits.
