* AnticlimaxBoss: If you prepare for the bosses, they'll become this trope. It's also possible to [[spoiler:kill 'em all with Armageddon]].
* AuthorsSavingThrow: The North American version of ''Eternal Punishment'' is a peculiar example, as it reverted the original ''Persona'''s characters back to their canonical Japanese surnames. For sake of continuity, however, the characters' first names were left Anglicized. The localization team tried to compensate for this ContinuitySnarl by retconning some of the bigger translation goofs; For example, the revelation that "Guido Sardenia" is actually an alias for Guido Kandori, the previous game's antagonist. He's still named Guido, due to Nate and co. retaining their western names, so ''Eternal Punishment'' breaks even and just calls him Guido Kandori.
* AwesomeEgo: For most of Innocent Sin Eikichi Mishina would happily talk about how awesome he is, and most of the fans of the game would agree.
* CrowningMomentOfAwesome: Admit it. After many times Nyarlathotep dicking you out, it's always satisfying to say it with Baofu about [[ScrewDestiny taking all the fate Nyarly's talking about, and then stick it up his ass]]. [[DidYouJustPunchOutCthulhu Then do it]].
* CrowningMusicOfAwesome: Many in both the PSX and PSP [=OSTs=], but the boss battle music and JOKER stand out.
* EnsembleDarkhorse: While this may be the one Persona game without a single [[TheScrappy scrappy]], [[DreadfulMusician Eikichi]] and [[{{Adorkable}} Katsuya]] are absolutely ''adored'' by the fandom, to the point that the idea of them returning as DLC or in a sequel to ''Persona4Arena'' has them ''stoked''.
* FridgeBrilliance: Honestly, a majority of the plot and setting can be considered FridgeBrilliance, as the more you look at it the more everything seems to lock together on a variety of levels. Even the most bizarre aspects of the game end up being [[JustifiedTrope justified]] since [[spoiler: reality becomes whatever nonsense is spread widely enough by word of mouth, no matter how insane or stupid the rumor happens to be.]] Even the things that don't make any kind of sense, on reflection, make perfect sense.
** Case in point: Hitler. Just some random bullshit used as an excuse to introduce new villains, right? Nope. The Nazis are actually symbolic of the evil humans commit in groups (for example, Hitler didn't invent anti-semitism, and no-one told him to stop). This also foreshadows Hitler [[spoiler:actually being Nyarlathotep]].
* FridgeHorror: In EP when the gang get trapped in the Kimon Tonku formation, there's a TV Producer who is quite rightfully scared about being trapped. We don't see her again after the spell is broken and everything returns to normal. Was she still stuck under the influence of the spell?
* HoYay: Jun Kurosu, who ''definitely'' sees Tatsuya Suou as more than a friend.
** Parts of the game and [[WordOfGay interviews]] would imply Suou and Kurosu are the intended ''Innocent Sin'' pairing. Specifically scenario designer Satomi Tadashi [[note]]Interestingly enough, he seems to ship both Tatsuya/Maya and Tatsuya/Jun [[/note]] and character designer Kaneko Kazuma.
* LesYay: Yukino and Anna in ''Innocent Sin''. [[spoiler: If you pick the wrong choice to leave Yukino behind at the entrance to Caracol, Anna will jump off the bridge in Caracol holding hands with Shadow Yukino, who convinced her to do it so that they would be together forever. If you bring Yukino, she will, after you fight Joker, give her Persona ability to Jun and go off into the city to fight Nazis with Anna, who has promised to look after her now that she doesn't have her Persona anymore]].
* MemeticMutation: Let's positive thinking!
* MoralEventHorizon: [[spoiler: Believing and support in the apocalypse started by Nyarlathotep would be bad enough, but Okamura definitely crosses one when she stabs Maya with the spear of Longinus, killing her in ''Innocent Sin''.]]
* NeverLiveItDown: Even if Philemon is the personification of human's goodness and tried his best to help the heroes against Nyarlathotep [[GodsHandsAreTied with his hands tied]], good luck finding people who won't consider him a jackass because he made the bet with Nyarlathotep in the first place.
** AlternativeCharacterInterpretation: Philemon isn't like the Abrahamic God, being all-powerful compared to Nyarlathotep's Devil. No, Phil and Nyarly are roughly equal in power and Philemon is actually saving us by making "the bet" - because if he didn't push Nyarlathotep into accepting a game with rules, using humans as the pieces, then Nyarlathotep would just lash out first and destroy everything. This way, we get a chance and Philemon gives us the power to keep pushing back. He is still kind of a callous jerk about the damage this does to his chosen champions' lives, though.
* TearJerker: A flashback shows Maya's father leaving her at the shrine. After telling her that dreams can come true if she wishes at the shrine, she gives him a good-luck charm [[IconicItem Mr. Bunbun]]. He tries to cheer her up saying [[IronicEcho "Mr. Bunbun will laugh at you if you don't stop crying."]] He then leaves, with the adult Maya, who is looking on pleading with him not to go. The entire team ends up in tears and Tasuya can allow a CryIntoChest option for Maya. After calming down, she then tells the team a poem about death and being forgotten. The entire team then tries to cheer her up, saying that they will never forget her again. [[HarsherInHindsight Cue the ending...]]
* ThatOneBoss: The FinalBoss of Innocent Sin, Great Father [[spoiler: Nyarlathotep]]. He can launch five attacks in one turn and will pretty much annihilate you unless you're at a high level. In Eternal Punishment [[spoiler: the Metal Trio]]. They don't have much HP, but they're immune to physical damage all have really strong attacks that hit your whole party.