Hho0SP Thanks again for the post. Will read on...
 In Game
Jin was among the lot of wayward youths taken in by the Kirijou Group years ago, subjected to various experiments that enabled ordinary people to artificially summon a Persona. The purpose of this is to create a sizable exploration group for Tartarus, given the significant lack of manpower with natural potential at their disposal (at the time, only Mitsuru Kirijou exhibited such abilities). Unfortunately, the children constantly had to take mental suppressants, because an artificially awakened Persona is extremely volatile and will kill its summoner when given the chance. However, taking the drugs regularly also meant shortening their lives.
Out of the thousands of youths used in these experiments, only three survived. Jin is one of them, along with Takaya and Chidori. To be able to sustain themselves (and to keep a steady supply flow of suppressants which they badly need), the trio that came to be known as Strega made their living at first by selling themselves as small-time street assassins, taking contracts from a "revenge website" that Jin personally manages, getting a lot of hits thanks to his internet-savvy and online popularity. He uses the very same clout to propagate a doomsday cult that he forms with Takaya, spreading the news about the advent of the Fall and the "salvation" that would be brought about by the coming of Nyx.
Jin is almost always found with Takaya, but is never seen at all in the daytime. He walks around carrying a metal suitcase and smugly tossing a grenade about, ready to use it at a moment's notice. Jin greatly believes in Takaya, and will stop at nothing to see that his purposes are fulfilled.
- In the JP version, Jin's accent and words are laced with Kansai-ben, suggesting that he hails from the southwestern part of Japan.