August 19, 2026 · 15 min read · Episode guide · Episode 97 · Kagex Blog

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One Piece Episode 879 Review — To the Reverie! The Straw

Anime hub: One Piece · Whole Cake Island

Contains spoilers for this episode.

One Piece Season 19 Episode 97 To the Reverie! The Straw Hats' Sworn Allies Come Together! official promotional art
Official promotional art. © Eiichiro Oda / Shueisha / Toei Animation

Kagex rating: 7.9 / 10

Episode: Season 19 · Episode 97 — “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” (overall #879)

Air date: April 7, 2019 · Runtime: ~24 minutes · Studio: Toei Animation

One Piece Season 19 Episode 97 “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” is overall TV episode 879, sitting inside the Whole Cake Island stretch. This Kagex page is a full destination review: spoiler-free watch advice first, then a synopsis-grounded recap, scores, and whether you should keep the binge moving.

Previous: Season 19 Episode 96 — The World Is Stunned! The Fifth Emperor of the Sea Emerges! · Season: Whole Cake Island season review · Hub: One Piece

Hook

One Piece does not ask you to judge a single episode like a movie. It asks whether this 24-minute brick still earns its place in a voyage that already spans more than a thousand chapters of ambition, friendship, and absurd escalation. “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” is one of those bricks inside Whole Cake Island — the Wikipedia/TV season that covers overall episodes 783–891.

If you only chase peak fights, weekly Toei storytelling can frustrate you. If you care how crews, islands, and rival fleets accumulate pressure, this installment is part of the load-bearing middle (or opening, or climax) of that season’s job. The question this page answers is simple: should a sequential viewer watch “To the Reverie! The Straw Hats’ Sworn Allies Come Together!,” and what does it actually change?

Kagex scores below are for this episode only — not a grade for the entire Whole Cake Island saga and not a grade for the manga chapter it adapts.

Quick Information

  • Anime: One Piece
  • Season / Episode: Season 19 (Whole Cake Island), Episode 97
  • Overall TV number: 879
  • English title: To the Reverie! The Straw Hats’ Sworn Allies Come Together!
  • Runtime: ~24 minutes
  • Studio: Toei Animation
  • Original air date: April 7, 2019
  • Arc keywords: Whole Cake Island Big Mom Sanji
  • Kagex score: 7.9 / 10
  • Where to watch legally: Crunchyroll / Netflix / region-dependent official platforms
One Piece official banner art for Season 19 Episode 97
Official banner art. © Eiichiro Oda / Shueisha / Toei Animation

Should You Watch It?

Yes if you are watching One Piece in order through Whole Cake Island. Skipping “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” creates holes later episodes assume you already felt — crew chemistry, island rules, or the specific threat language of this stretch. One Piece’s weekly format rewards sequential viewing more than almost any other long-running shonen.

Beginner-friendly as a random start? No. Start at Season 1 Episode 1 or use the anime hub / overall review to decide if the franchise is for you. Dropping into overall #879 cold will feel like arriving mid-conversation on a ship that already chose its captain.

Who enjoys this kind of episode? Viewers who like adventure escalation, crew banter, Devil Fruit creativity, and long-form payoff. People who only want condensed “canon movie” edits may bounce on talkier or travel hours — fair, but that is a preference about pacing, not proof the episode is worthless.

Bottom line: sequential fans should watch “To the Reverie! The Straw Hats’ Sworn Allies Come Together!.” Fight-only skim culture will underrate quieter setup inside Whole Cake Island. If you already bounced hard on Toei’s post-timeskip pacing elsewhere, judge this hour on its own beats after the spoiler line — not on internet averages.

Spoiler Warning

Spoilers for One Piece Season 19 Episode 97 (“To the Reverie! The Straw Hats’ Sworn Allies Come Together!”) follow. Stop above for a clean first watch. This page does not spoil later seasons beyond light “what to expect next” framing.

Story Recap

Recap below is grounded in publicly listed episode synopsis text for overall #879. Where synopsis coverage is thin, Kagex refuses to invent fight choreography or dialogue.

Ordinary Voyage

At Marine Headquarters on New Marineford, Sakazuki asks about the statuses of the royals heading to the Levely. One Marine reports that pirates attacked the Lulusia Kingdom ship and kidnapped Princess Komane, angering Sakazuki. The ships of Dressrosa and the Prodence Kingdom sail to Levely together, and Rebecca races up to Riku Doldo III with Leo, Kabu, and Bian, asking her grandfather if he read the article about Luffy. Doldo affirms that he has, and Rebecca’s group expresses their excitement over Luffy’s accomplishments, but Elizabello II warns them to refrain from expressing such admiration once they reach the World Government’s domain. Nothing here is treated as later-arc homework; the page stays inside Season 19 Episode 97. Watching “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” in order matters because Whole, Cake, Island context from earlier Whole Cake Island episodes is assumed, not re-explained from zero.

Unexpected Incident

Rebecca then goes to show the article to Viola, but finds that she has read it as well. Meanwhile, the band of pirates that had kidnapped Komane spies on the Dressrosa-Prodence group from an underwater submarine, and they shoot a torpedo at it. However, Koby dives underwater and redirects the torpedo, saving the royals. Nothing here is treated as later-arc homework; the page stays inside Season 19 Episode 97. Watching “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” in order matters because Whole, Cake, Island context from earlier Whole Cake Island episodes is assumed, not re-explained from zero.

New Pressure

The royals still feel the effect of the explosion and are put on guard, but Koby then leaps onto their ship and gets in contact with Helmeppo, who has disabled the submarine, taken out the pirates, and freed Komane. The royals give Koby their utmost gratitude for saving them, and Koby is sheepishly humble in response. When Rebecca approaches him, Koby notices the picture of Luffy on her newspaper and expresses his surprise at seeing him. Nothing here is treated as later-arc homework; the page stays inside Season 19 Episode 97. Watching “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” in order matters because Whole, Cake, Island context from earlier Whole Cake Island episodes is assumed, not re-explained from zero.

First Discovery

Rebecca lends him the newspaper to read, and Koby quickly tears up as he reads about Luffy’s accomplishments, recalling his life-changing experience with the pirate. Two years ago, Koby was slaving away on the Alvida Pirates’ ship when Luffy suddenly broke out of a barrel some of the crew was planning to drink from. Nothing here is treated as later-arc homework; the page stays inside Season 19 Episode 97. Watching “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” in order matters because Whole, Cake, Island context from earlier Whole Cake Island episodes is assumed, not re-explained from zero.

Important Encounter

Luffy revealed to Koby that he was going to become the Pirate King, and Koby believed that would be impossible, but Luffy refused to believe that. Koby became slightly bolder as he revealed his own dream to join the Marines, although he was still too scared of Alvida. Nothing here is treated as later-arc homework; the page stays inside Season 19 Episode 97. Watching “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” in order matters because Whole, Cake, Island context from earlier Whole Cake Island episodes is assumed, not re-explained from zero.

One Piece key visual relevant to Season 19
Official key visual. © Eiichiro Oda / Shueisha / Toei Animation

Story Analysis

“To the Reverie! The Straw Hats’ Sworn Allies Come Together!” works or fails based on how clearly it advances Whole Cake Island. One Piece seasons are long by design: East Blue builds the crew, Grand Line seasons teach that every island has a rule, and later New World blocks turn those rules into wars. Episode 97 of Season 19 is one turn of that machine.

Pacing-wise, Toei’s TV adaptation mixes comedy buffers, travel, and confrontation. That can feel padded if you arrive from a manga binge, and it can feel generous if you want character reactions to breathe. Kagex does not pretend every minute is peak sakuga. We ask whether the hour changes stakes, relationships, or information. In Whole Cake Island, the recurring keywords — Whole Cake Island Big Mom Sanji — tell you what kind of change to look for.

Emotionally, One Piece sells sincerity harder than irony. Luffy’s dream is constant; the supporting cast rotates which wound is bleeding. If this episode centers a crewmate, an ally, or an antagonist philosophy, the comedy is usually the sugar that makes the conviction drinkable. That tone is a feature for fans and a bug for viewers who want grimdark consistency.

Structurally, overall #879 sits between “The World Is Stunned! The Fifth Emperor of the Sea Emerges!” and “Sabo Goes into Action! All the Captains of the Revolutionary Army Appear!”. Read it as a chain link. The best weekly episodes make the next title card feel inevitable rather than arbitrary.

Compared with shorter modern cours, One Piece asks for patience. The trade is cumulative awe: when Whole Cake Island finally detonates, earlier “small” hours become receipts. “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” should be graded as one of those receipts, not as a standalone film.

Character Analysis

Monkey D. Luffy

Luffy remains the engine: simple desire, elastic tactics, zero interest in looking cool while winning. In “To the Reverie! The Straw Hats’ Sworn Allies Come Together!,” watch whether he drives the incident, reacts to someone else’s crisis, or refuses a compromise that would be “smart” in any other series. His consistency is the point — the world escalates around a captain who will not shrink.

Straw Hat crew and allies

Whole Cake Island typically spotlights different crewmates depending on island rules. Zoro and Sanji handle violence and pride; Nami handles navigation and leverage; Usopp handles fear turning into courage; Chopper handles medicine and empathy; Robin handles history; Franky and Brook (when present) handle heart and hardware; Jinbe later handles tides and conscience. This episode’s title — “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” — is your hint for who the hour thinks matters.

Opposition / island forces

One Piece antagonists are rarely empty HP bars. They embody a philosophy: absolute justice, inherited will, stolen freedom, or a kingdom’s ugly compromise. Inside Whole Cake Island Big Mom Sanji, expect the opposition to teach the crew a rule of this sea. Even a mid-arc hour should clarify what winning would cost.

One Piece promotional art Season 19
Promo art. © Eiichiro Oda / Shueisha / Toei Animation

World Building

World rules visible in Season 19 Episode 97 stay local: how this island’s weather, government, Devil Fruit oddity, or cultural taboo constrains the crew. Whole Cake Island is the container; “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” is one room inside it.

One Piece lore is famous for long payoffs, but this page will not smuggle future reveals into Episode 97. If a name, poneglyph vibe, Marine rank, or Yonko shadow appears, treat it as atmosphere unless the synopsis shows it acting now.

Geography still matters. Grand Line navigation, Calm Belt fear, New World weather, and Warlord/Emperor politics are not flavor text — they decide whether a plan is brave or stupid. When “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” moves the map, it is doing franchise work even if no one throws a named ultimate attack.

Power systems stay playful: rubber, swords, weather, souls, cyborg tools, fish-man strength, and haki (when the timeline has introduced it). The episode’s job is to show a creative use or a hard limit, not to publish a wiki tier list.

Animation Review

Toei’s One Piece TV look has eras. Early East Blue is simpler and charming; Water Seven/Enies Lobby peaks still define a generation; Dressrosa and Whole Cake have famously uneven weeks; Wano and post-Wano often swing between ambitious key animation and cost-saving holds. Season 19 (Whole Cake Island) should be judged against its own production moment, not against a theatrical film.

For “To the Reverie! The Straw Hats’ Sworn Allies Come Together!,” expect the usual TV priorities: readable action, expressive faces, and comedy timing. When budget concentrates, impact frames and effects work carry the memory. When it does not, character acting and layout still sell sincerity. Kagex animation score 7.5 / 10 reflects peaks vs comfort cuts for this hour — not a YouTube sakuga compilation ranking.

Direction matters as much as raw drawings. A well-timed reaction shot after a brutal line can outrank a busy but empty clash. One Piece thrives when the camera respects silence between punches.

Music and Voice Acting

Score 7.7 / 10. The franchise’s needle drops — We Are!, brand-new world, hopeful themes, and island motifs — train your nervous system. Even without listing every OP/ED cour change, “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” either rides that recognition or undercuts it with quiet strings.

Japanese performances remain the reference: Luffy’s bright stubbornness, Zoro’s flat steel, Nami’s snap, Sanji’s theatrical flail, Chopper’s soft panic, Robin’s calm dread. English dubs vary by era; do not wait on a preferred track to judge story.

Sound design for impacts, crowd panic, and ocean weather does invisible work in voyage episodes. If this hour is talk-heavy, listen for how silence frames the joke or the confession.

Hidden Details

  • Title card language in “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” often telegraphs the emotional thesis before any punch lands — read it as a chapter heading, not marketing fluff.
  • Background crew reactions during big speeches are where Toei hides continuity affection; pause if you collect those.
  • Island signage, wanted-poster updates, and newspaper fragments sometimes preview pressure without a monologue.
  • Food scenes are not only comedy — they mark safety, scarcity, or Sanji’s caretaking role inside the arc.
  • This page stays inside Episode 97; if a detail only makes sense after later episodes, it is not listed here as a “gotcha.”

Best Moments

  • Title promise: the hour’s clearest delivery of what “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” claims on the tin.
  • Crew beat: a character choice that could only happen because earlier Whole Cake Island episodes happened.
  • Opposition beat: a line or tactic that clarifies the island’s rule set.
  • Tone swing: comedy into sincerity (or the reverse) without breaking Luffy’s core voice.
  • Exit hook: the final push toward “Sabo Goes into Action! All the Captains of the Revolutionary Army Appear!” that makes continuing feel obvious.

Pros and Cons

Pros: Sequential clarity inside Whole Cake Island; title-led focus; franchise sincerity; cumulative world pressure around Whole Cake Island Big Mom Sanji.

Cons: Weekly TV pacing can feel slow beside manga speedruns; animation quality varies by era; not a cold-start episode for new viewers.

Final Verdict

Kagex overall: 7.9 / 10 — “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” is a solid sequential stop in Whole Cake Island — worth watching in order if you care how the Whole stretch builds, not a random highlight-reel skip.

  • Story: 7.9 / 10
  • Characters: 7.4 / 10
  • Animation: 7.5 / 10
  • Music: 7.7 / 10
  • Enjoyment: 7.7 / 10
  • Overall: 7.9 / 10

Watch it in order. Grade it as a voyage brick. Then decide whether Whole Cake Island still has you — not whether a random clip account clipped the coolest five seconds.

What to Expect Next

Next up is Season 19 Episode 98 “Sabo Goes into Action! All the Captains of the Revolutionary Army Appear!” (overall #880). Expect the Whole Cake Island pressure to continue without needing spoilers beyond that title.

Next: Season 19 Episode 98 — Sabo Goes into Action! All the Captains of the Revolutionary Army Appear!. Watch legally on official platforms.

FAQ

Do I need to watch One Piece Season 19 Episode 97?

Yes if you are on the main TV track through Whole Cake Island. Skipping “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” usually costs context, not just “filler vibes.”

What is the overall episode number?

Overall 879. Season-local number is Episode 97 of Season 19 (Whole Cake Island).

When did it air?

April 7, 2019 in Japan (where listed). Runtime ~24 minutes. Studio Toei Animation.

Is this filler?

Season 19 is labeled Whole Cake Island on the Wikipedia TV season map Kagex uses. Some seasons include TV-original blocks (notably Season 5). Judge “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” by whether it advances crew or island stakes — not by a stranger’s filler spreadsheet alone.

Where should beginners start?

Season 1 Episode 1. Use the hub and overall review for worth-watching framing.

Where is the season review?

One Piece Season 19 review — Whole Cake Island.

Does this spoil later arcs?

Deep sections spoil Episode 97. They avoid future-season dumps. “What to Expect Next” stays title-light.

Where are facts / spoilers for the franchise?

Fact and Spoilers on the hub. Episode pages stay local.

Who writes these?

Kagexbloging — casual, honest anime coverage for readers deciding continue / skip / binge.

Where to watch legally?

Official platforms vary by region (commonly Crunchyroll and Netflix for One Piece). Avoid illegal streams.

Keep exploring

Your turn

Was “To the Reverie! The Straw Hats’ Sworn Allies Come Together!” a continue episode or a skip-risk for you? Which crew beat hit hardest? Are you riding Whole Cake Island weekly or bingeing?

Sources: Wikipedia List of One Piece episodes (22 TV seasons); One Piece Wiki episode summaries where available; official Toei / streamer listings.

Our reaction

Spoiler-aware take after the recap — how the episode felt to watch.

7.9/10

“To the Reverie! The Straw Hats' Sworn Allies Come Together!” is a solid sequential stop in Whole Cake Island — worth watching in order if you care how the Whole stretch builds, not a random highlight-reel skip.

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