Persona 3 Reload: Jin Shirato (Merciless / Orpheus Only)

Jin has a special treat just for you, ailment spam.

Jin got somewhat of a buff from how he was in FES / Portable, his HP is higher, he has access to most elements in the game, and he'll scan you for weaknesses to try and knock down your party members. Humorously he'll acknowledge if you come in without any weaknesses, but then he'll resort to spamming his signature attack, EX Flash Grenade which is Almighty Damage that can inflict Confusion, so it's better to bring in accessories / armour that reduce elemental damage instead. If he knocks down a Party Member, he has a chance to use Dekaja, Heat Riser, Debilitate or Marakunda.

Jin has no weakness (Repels Dark and Fire, so Koromaru isn't too helpful besides Debilitate) and he now has a brand new Phase 2, where when he reaches less than 1/4 of his HP he'll inject himself with Steroids that permanently gives him Concentrate / Charge. Even if you have an OP Persona Build, you cannot skip this phase because he's scripted to always survive with at least 1 hp, but when he buffs he also poisons himself to chip off 1600hp each turn. So in theory you could just put on Marakukaja and wait til his HP gets low and finish him off. His Attacks do get much stronger in this form, he has Gods Hand, Primal Force and Megidolaon, and those can oneshot most Party Members if you aren't guarding / buffed.

Cool Boss tho, and I'd say this improved on how he was in FES / Portable where he was pathetically easy (He used Megido while being an endgame boss lol)