Nevertheless, Jin was portrayed as the main character from multiple adaptations of the games. His constant fights with his family members would eventually lead him to become an antiheroic character, as crafted by Bandai Namco's director Katsuhiro Harada ever since his introduction. Initially conceptualized as an innocent man, Jin was developed as the series' new protagonist and a replacement for Kazuya, who he was based on visually. Outside of the video games, Jin has appeared in the animated and live-action films adapted from the games and have also appeared as a playable character in several other game franchises.

While dealing with his relatives, Jin loses control of the Devil Gene, which causes his transformation into an alter ego named Devil Jin ( Japanese: デビル仁, Hepburn: Debiru Jin), first introduced as a non-playable character in Tekken 3 and playable ever since Tekken 5. He is also antagonized by his father, Kazuya Mishima, from whom he inherited the devil gene.

Mishima-ryu Karate (Devil Jin) (Tekken 5-Tekken 7) Traditional Karate ( Tekken 4-onward human form only).Mishima-ryu Karate mixed with Kazama-style traditional martial arts ( T3-TTT).