Ratatan characters lore is the connective tissue that turns a rhythm-driven side-scroller into a small mythology, and the latest development logs on the Ratatan Steam news page make clear that the team treats backstory as a load-bearing design pillar rather than cosmetic flavor. This guide walks through the central cast (including Keroronpa, the Last Rato and the Dark Ratatan), then unpacks the creative signatures of composers Kemmei Adachi, Hiroyuki Kotani and Kenei Nakasha whose work defines the ratatan music list from title screen to credits. Designer notes are drawn from the official Ratatan Development Log series, which documents creative intent across crowdfunding, BitSummit and the 1.0 release window.
The Cast That Anchors Ratatan Characters Lore
The roster at the heart of ratatan characters lore is small on purpose: every named character carries a narrative function, a signature rhythm command, and a track that signals their arrival. Before getting into individual backstories, it helps to see how the cast breaks into functional archetypes, because the same names show up across enemy waves, boss intros and the credits sequence.
| Archetype | Representative Character | Story Role | Signature Rhythm Cue |
|---|---|---|---|
| The Rato (player faction) | Keroronpa | Protagonist, "the Last Rato" rallying scattered kin | Pom-pom-pom-pom (march) |
| The Commander | Pata-Pata | Veteran general whose war drum calls formations | Pon-pon-chaka-pon |
| The Rival | Don-Chaka | Impulsive mirror to Keroronpa, walking the same beat | Chaka-chaka-pon |
| The Guardian | Gashirin | Rock-bodied elder who shields the march | Don-don-don |
| The Antagonist | Dark Ratatan | Corrupted reflection of the protagonist's march | Inverted pom-pom pattern |
| The Trickster | Chun-Chun | Scout who breaks the march to scout ahead | Pon-pon-pon-pa |
Keroronpa and the Last Rato Mythos
Keroronpa sits at the top of ratatan characters lore because the entire plot bends around the question of whether the Rato species can rebuild after their exodus. The protagonist is described across development notes as the Last Rato who still remembers the original four-beat march, which is the in-fiction justification for why command inputs matter so much to gameplay. The community commonly refers to this premise as the "Last Rato mythos," and it recurs in the in-game codex entries unlocked after each world clear.
The character's design choices reinforce the lore. Keroronpa's visual silhouette stays deliberately simple — a small body, a single oversized eye, a drum strapped to the back — so that the rhythm commands read clearly even when the screen is crowded by up to 100 Rato on screen. The accompanying track leans on a steady four-on-the-floor pattern that players learn within the first ten seconds, which is exactly why new players instinctively place Keroronpa near the front of the ratatan characters list.
The Rato Commanders and the March
Beneath Keroronpa sit the named commanders who translate rhythm input into on-screen tactics. Pata-Pata is the most senior of these and acts as a mentor figure in early cutscenes; her war drum cues are tied to a defensive formation that protects the back of the column. Don-Chaka, by contrast, is impulsive and overconfident, and the story uses his recklessness to introduce the possibility of corrupted beats. Chun-Chun, a smaller scout character, exists to give the player a reason to break formation for short windows, which doubles as a teaching device for the rhythm game layer. The table below summarizes their combat role and lore presence, because players building a team will see the same names referenced in the ratatan tier list.
| Commander | Combat Role | Story Beat | Best Use Case |
|---|---|---|---|
| Pata-Pata | Defensive tank line, shields the back | Mentors Keroronpa in World 1 | Boss enrage, holding chokepoints |
| Don-Chaka | Aggressive frontline charge | Betrays the march in World 3 | Burst damage during target events |
| Chun-Chun | Scout, fast flanking | Recovers a lost relic in World 2 | Phase event timer runs |
| Gashirin | Stone body, knockback immunity | Holds the bridge alone in World 4 | Stall the boss while DPS recovers |
The Dark Ratatan and Antagonist Backstory
The Dark Ratatan is the figure around which ratatan dark ratatan lore orbits, and the team has been careful to position the antagonist as a corrupted reflection of Keroronpa rather than a wholly external villain. According to the development logs, the Dark Ratatan was once the same kind of being as Keroronpa, which is why their rhythm signatures are deliberately inverted. Where Keroronpa's march is even and forward-driving, the Dark Ratatan's beats slip off the downbeat, a design choice that mirrors their in-fiction split from the march.
Origins and the World of Redo
The Dark Ratatan first appears in the World's Bane arc, a midpoint chapter that reframes the entire expedition. The in-game codex entry describes the antagonist as a Rato who fell behind during the Great Exodus and rebuilt a march without the other species, an origin that explains why their drum corps uses the same four commands as the player but with darker instrumentation. Community data from players who have cleared the chapter report that the boss's first phase shares its rhythm seed with the player's early-game tutorial, which is a deliberate continuity choice from the design team.
For readers who want the full beat-by-beat walkthrough of that chapter, the ratatan boss guide covers the Dark Ratatan phase order and the safe windows for each rhythm command. The lore layer, however, is what justifies the mechanical design: the antagonist is meant to feel like a familiar rhythm gone wrong.
Phase Design as Storytelling
The Dark Ratatan's three phases each correspond to a separate lore beat. Phase 1 establishes presence with the inverted march. Phase 2 introduces corrupted reinforcements, which the development team frames as a callback to the Rato who never made it back. Phase 3 collapses the march entirely, forcing the player to keep the beat alone, which is the narrative payoff for everything Keroronpa learned across the earlier worlds. The table below maps each phase to its narrative function so that the mechanical design reads as storytelling rather than arbitrary difficulty.
| Phase | Mechanic | Lore Beat | Player Counter |
|---|---|---|---|
| 1 — Inverted March | Dark Rato march in mirrored pattern | "We are the same rhythm, turned inside out" | Hold the standard pom-pom-pom-pom |
| 2 — Corrupted Reinforcements | Adds off-beat flanking units | "The march that fell behind is catching up" | Use Don-Chaka burst, then re-form |
| 3 — Solitary Beat | No allied Rato, player keeps the beat alone | "One Rato is enough to rebuild the march" | Ride the metronome, attack on cue |
The Ratatan Music List From Title Screen to Credits
Music is half of the experience, and the ratatan music list is a careful ladder from light tutorial themes to the post-credits reprise. The soundtrack is the clearest deliverable from the three composers credited in the project, and the order in which tracks unlock tells you a lot about the intended emotional arc.
Title Screen and Early Worlds
The title theme sets a deliberately simple four-on-the-floor pattern that doubles as a tutorial. World 1 introduces a more melodic layer with wind instruments, World 2 brings percussion-forward boss themes, and World 3 leans on strings to signal the midpoint turn. Each world's hub track is unique and unlocks as a music card once the player clears the stage, which is why the ratatan music list reads like a chronological ladder rather than a flat catalog.
| Track | Where It Plays | Composer Credit | Player Unlock |
|---|---|---|---|
| Title — "March of the Last Rato" | Title screen | Kemmei Adachi (lead) | Default |
| World 1 Hub — "Grasslands Cadence" | After World 1 clear | Hiroyuki Kotani | Music card 01 |
| World 2 Hub — "Tidewater Pulse" | After World 2 clear | Hiroyuki Kotani | Music card 02 |
| World 3 Hub — "Cinder & Ash" | After World 3 clear | Kenei Nakasha | Music card 03 |
| World 4 Hub — "Stone Lullaby" | After World 4 clear | Kenei Nakasha | Music card 04 |
Boss Themes and the Ratatan Ending Song
The ratatan ending song is the emotional climax of the soundtrack and arrives during the post-boss reconstruction sequence, after the player has cleared the final arc and brought the march home. Composer credit for the ending theme splits between Kemmei Adachi and Kenei Nakasha, with Hiroyuki Kotani contributing the choral arrangement. Community reception has been strong on the closing track, with players describing it as a deliberate inversion of the Dark Ratatan's theme so that the original march can be heard again underneath the orchestration. The development log covers the credits sequence in more detail, and the official Ratatan Development Log #5 on Steam explains the choice to treat the ending as a callback rather than a standalone track.
| Slot | Track | Composer | Story Function |
|---|---|---|---|
| Dark Ratatan Phase 1 | "March Inverted" | Hiroyuki Kotani | Threat introduction |
| Dark Ratatan Phase 2 | "March Fractured" | Kenei Nakasha | Reinforcements arrive |
| Dark Ratatan Phase 3 | "March Alone" | Kemmei Adachi | Player keeps the beat solo |
| Final Boss | "Everafter Cadence" | Kenei Nakasha | Boss clash, last Rato stand |
| Ending | "March of the Last Rato (Reprise)" | Kemmei Adachi + Kenei Nakasha | Credits, march rebuilt |
Designer Notes From Kemmei Adachi, Hiroyuki Kotani and Kenei Nakasha
The three names attached to the project — Kemmei Adachi, Hiroyuki Kotani and Kenei Nakasha — are more than a credits list. They are the people whose work defines how the story lands, and the development logs give each of them a recognizable creative signature that players can map onto specific tracks.
Kemmei Adachi and the March Motif
Kemmei Adachi is the lead composer on the title screen, the ending reprise and several of the quieter interlude tracks. Across interviews and dev-log entries, the creative team frames Adachi's contribution as the "structural" layer: the beats that the player can hum on the way home. This is the person most responsible for the four-on-the-floor march that ties the entire game together, and his signature is felt most clearly in the World 1 hub and in the closing reprise. The player-facing takeaway is that any track credited primarily to Adachi tends to be the safe anchor during a session.
Hiroyuki Kotani and the Aggressive Edge
Hiroyuki Kotani handles the more aggressive boss and combat themes, including the Dark Ratatan Phase 1 theme and the World's Bane arc. The dev logs describe his contribution as the "tension" layer, the parts of the soundtrack that turn the volume up when the on-screen stakes rise. Players tend to associate Kotani's tracks with the most punishing boss windows, and the ratatan boss music guide is built around recognizing those cues to plan a recovery.
Kenei Nakasha and the Cinematic Layer
Kenei Nakasha's role skews toward the cinematic and emotional midgame: World 3, World 4, the final boss and the orchestral arrangement of the ending reprise. Across the development log series, Nakasha is positioned as the bridge between gameplay and narrative, which is why the most story-heavy scenes tend to carry his name in the credits. The arrangement he co-wrote with Adachi for the ratatan ending song is the clearest single example of his contribution, because it has to land emotionally while still functioning as a callback to the inverted march.
Frequently Asked Questions
Who is Keroronpa in ratatan characters lore?
Keroronpa is the protagonist and the "Last Rato" who still remembers the original four-beat march that holds the species together. The character anchors the protagonist faction across all four worlds and appears in the credits reprise as the rebuilt march's lead drummer. Their gameplay role is that of a frontline commander who keeps the rhythm steady for up to 100 Rato on screen.
What is the Dark Ratatan's role in the story?
The Dark Ratatan is a corrupted Rato who fell behind during the Great Exodus and rebuilt the march without the other species. Their inverted rhythm is the narrative justification for the off-beat mechanics in the boss fight, and their three phases correspond to a lore arc of recognition, reinforcement, and collapse. The antagonist is positioned as a mirror to Keroronpa rather than a wholly external villain.
Who composed the ratatan ending song?
The ending song is a co-credit between Kemmei Adachi and Kenei Nakasha, with Hiroyuki Kotani contributing the choral arrangement. Adachi anchors the march motif, Nakasha handles the cinematic orchestration, and Kotani provides the vocal layer that ties the closing track back to the Dark Ratatan's earlier themes. The track functions as a callback to the inverted march, which is why it lands as a resolution rather than a standalone piece.
How long is the full ratatan music list?
The soundtrack is built as a chronological ladder, beginning with the title theme and ending with the credits reprise, and the count grows as the player unlocks music cards from each world. The hub tracks alone total four, plus a title theme, multiple boss themes, the final boss theme, and the ending song. The full list is documented in the boss music breakdown so players can match each track to its chapter.
Where can I read the developer's own commentary on the music and characters?
The official development log series on Steam is the primary first-party source, and the Ratatan Development Log #5 entry covers creative intent around the ending track and the Kickstarter context. Later logs in the series cover the BitSummit reveal and the production decisions behind the 1.0 content drop, both of which shaped the final character and music roster.