Jin's personality ranges from stoic and calm to rude and arrogant at times, and his words and actions hint at bitterness within him. Although he is portrayed as a monster in his devil form, in general, he is never portrayed as self-serving and cruel (unlike Kazuya and Heihachi) and everything that he does, he believes he does for a good reason. It is known that Jin used to be "sweet and nice" (as described by Xiaoyu and mentioned by other characters) prior to his betrayal by Heihachi. Some of Jin's more playful side can be seen in Hwoarang's Tekken 4 ending, as he comes to Hwoarang's aid and smiles when they get in trouble as a consequence. In Tekken 5, whilst he is single-minded in his attention to his family's drama, Jin does still express concern and compassion towards Xiaoyu and Hwoarang. However, after everything he has gone through, Jin seemed to have lost much of his human compassion. In Tekken 6, he goes out of his way to taunt Lars Alexandersson for showing care towards Alisa Bosconovitch, and mocks both Lars and Alisa.