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Tropes:
- Censor Box: Played for laughs with Chaldea's trusted source on Mini Nobbus, "Beautiful Famous Genius Artist," who's blatantly Da Vinci but with her eyes covered by a censor box.
- Clean Food, Poisoned Fork: Nobukatsu kills the male "real deal" Nobunaga by applying poison to his wine cup.
- Debut Queue: Nobunaga (Avenger) appears as the event's 5* limited Servant, and Mori Nagayoshi joins as a 3* Berserker.
- Developer's Foresight: If you haven't started the Lostbelt arc, then Da Vinci will still be in her Caster form during her cameo instead of her Rider form.
- Disc-One Final Boss: Demon King Nobunaga is set up as the final foe due to being the most dangerous and last of the Nobunagas fought, but in reality she is the biggest threat to the actual Arc Villain in the High Priest of Makuzu.
- Foreshadowing: The Singularity-creating simulation MacGuffin that kicks off the plot is eerily reminiscent to a similar technology that the Alien God used to test Kirschtaria Wodime's might by having him live out various permutations of the missions from Part 1.
- Here We Go Again!: After completing Part 2 of the event, which was caused by Okita Alter being left behind in the simulation, Mash runs in shouting about how they left Mori in the simulation and now it's spawned a Singularity with nothing but Berserkers. Demon King Nobunaga decides that everyone had enough adventure and stops the story right there.
- Never Trust a Title: Having 'Final' as part of the subtitle of the event doesn't mean that this is the Grand Finale of the GUDAGUDA mini-series, as noted by a KOHA-Ace strip
later on. After all, out of the original Imperial Holy Grail War Servants up until this installment, Caster (Maxwell's Demon) hasn't been playable or fightable... - O.O.C. Is Serious Business: Chacha drops her child-like persona for a moment as the final stroke needed to soothe her stepfather, Shibata out of his rampage.
- Plot Tailored to the Party: The various side quests usually have a designated NPC whose presence nerfs the mission's difficulty, such as Medea turbo-charging the party's NP gauges in a fight where the enemy resists all non-NP damage.
- Reverse Psychology: Izo initially refuses to join the rescue mission, and is persuaded by Oryou saying he's too weak for it anyway and "the udon lady" would do better.
- The Unfought: Big Nobbu agrees to join Clan Chaldea without a fight as thanks for them saving her and the other Mini Nobbus from Makuzu's forces.
- Victory by Endurance: Chacha attempts to pull this off, utilizing Fortress of the Sun's magical barrier to keep herself safe and wait until the other warlords have eliminated each other before she comes in to reap the rewards. Unfortunately the castle's Magical Reactor can only be recharged by Hideyoshi, causing the barrier to eventually come down due to Chacha's indulgence and leaving her open for an attack.
