August 15, 2026 · 8 min read · Episode guide · Episode 6 · Kagex Blog

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That Time I Got Reincarnated as a Slime Episode 6 Review — The Council of the West

Anime hub: That Time I Got Reincarnated as a Slime · Season 4 (through Episode 18)

Contains spoilers for this episode.

That Time I Got Reincarnated as a Slime Season 4 Episode 6 The Council of the West official promotional art
Official promotional art. © Fuse / Kodansha / Eight Bit / Tensura Production Committee

Kagex rating: 8.8 / 10

Episode: Season 4 · Episode 6 — “The Council of the West”

Air date: May 15, 2026 · Runtime: ~24 minutes · Studio: 8bit

The Council of the West is the trap going loud: a domination orb, Elric’s coup-in-a-meeting, Hinata and Shuna throwing hands, Glenda trying to snipe a prince, and King Aegil arriving to arrest his own conspiracy. Tempest gets a real alliance. Johann starts sweating.

Previous: Season 4 Episode 5 — The First Step · Hub: That Time I Got Reincarnated as a Slime

Hook

The Council of the West is the trap going loud: a domination orb, Elric’s coup-in-a-meeting, Hinata and Shuna throwing hands, Glenda trying to snipe a prince, and King Aegil arriving to arrest his own conspiracy. Tempest gets a real alliance. Johann starts sweating.

This page is the sequential stop after Episode 5 — not a random recap dump. Scores below are for this 24 minutes only.

Quick Information

  • Anime: That Time I Got Reincarnated as a Slime
  • Season / Episode: Season 4, Episode 6 (overall #78)
  • English title: The Council of the West
  • Japanese episode title: 西方諸国評議会
  • Runtime: ~24 minutes
  • Studio: 8bit
  • Original air date: May 15, 2026
  • Kagex score: 8.8 / 10
  • Where to watch legally: Crunchyroll (region-dependent)
That Time I Got Reincarnated as a Slime official banner Season 4 Episode 6
Official banner art. © Fuse / Kodansha / Eight Bit / Tensura Production Committee

Should You Watch It?

Watch this. It is the first cour’s political action peak. If you skip, you miss how Tempest joins the West without wearing a collar. Beginner-unfriendly, payoff-rich. The assassination frame is the same trick as the Dragon Buster, wearing a different hat.

Beginner-friendly? No as a start point. Watch from Season 1 Episode 1. This installment assumes you already know Tempest’s core cast — Rimuru at minimum.

Bottom line: sequential viewers should not skip “The Council of the West.” Fight-only watchers may feel the talkier stretches; nation-building fans will not.

Spoiler Warning

Spoilers for Season 4 Episode 6 (“The Council of the West”) follow. Stop above for a clean first watch. This page does not spoil later episodes.

Story Recap

The paper was a leash

The Council is grabbing at the train, weapons, fortune, dungeon — Rimuru hears slavery. Raphael feels a mental push on the room. Rimuru strips it and wonders who, without blaming Yuuki. Then Elric arrives with Reiner, Team Green Fury, Vent, and Gaiye, summoned by Elder Gaban against Lester’s wishes. The rest of the Council did not vote for a kidnapping. Hinata is displeased. Elric wanted to take and control Rimuru anyway. He pulls an Orb of Domination — the same toy Clayman used as a Milim prop — and it does nothing useful to a True Demon Lord. He still tries to force it on.

The room picks a side

The Council turns on Elric. Rimuru exposes Gaban’s plan. Elric’s crew will not stand down. Hinata takes Reiner. Gaiye goes at Rimuru; Shuna takes that fight instead, breaks the holy sword, and drops him with magic. Raphael catches Glenda lining up Elric as a corpse to pin on Rimuru. Rimuru stops the shot. Reiner and Gaiye get arrested. The meeting became a raid, and Tempest still did not murder the prince.

Dad enters politics

Elric clocks that Rimuru is not the villain and that Gaban is, but he has no proof. King Aegil of Engrassia walks in, allies with Rimuru, disciplines his son, and has Gaban arrested. Johann, in the room, starts calculating losses. The Council accepts Tempest on more peaceful terms. Offstage, Souei meets Glenda after the failed sniper run. The trap produced the opposite headline: the slime saved the idiot prince.

Green Fury unmasked as a tool

Last week’s dungeon scouts are this week’s kidnapping extras. Gaiye is the recurring heel in another uniform. Vent’s party was never just a speedrun. The labyrinth and the Council were always the same war on two maps. Rimuru treating the orb like junk is the power-scale joke. Shuna handling Gaiye is the “we brought the right people” joke.

Membership, not a collar

Tempest is in. The terms are less poisonous because the conspiracy had to go loud. Maribel’s script called for a monster murdering a prince. The footage is a Demon Lord blocking an assassin. Season 4’s first cour just failed the way Muese failed: in public, with witnesses.

That Time I Got Reincarnated as a Slime key visual Season 4 Episode 6
Official key visual. © Fuse / Kodansha / Eight Bit / Tensura Production Committee

Story Analysis

This is the Hinata-duel structure wearing suits: forged situation, almost-murder, actual adults arriving late. Comedy is the orb failing. Emotion is Elric having to eat his theory. Action is short and pointed. Mystery of “who pushed the Council’s minds” is answered enough without a full Greed lecture in the chamber.

World-building is Orbs of Domination as recycled Clayman tech, Council security being a joke, and a king who can still override his Elders if he walks in personally. Do not invent extra fight winners beyond what aired: Hinata over Reiner, Shuna over Gaiye, Rimuru stopping Glenda’s kill shot, Aegil arresting Gaban. That is the board.

Character Analysis

Rimuru is the insulted head of state who still saves Elric. Hinata is the allied Saint in the room. Shuna is the one who benches Gaiye. Benimaru and Souei are the cabinet; Souei’s Glenda chase is the sting. Elric is the useful idiot who learns. Reiner and Gaiye are the muscle that loses. Gaban is the arrested Elder. Aegil is the king who can still parent a continent. Lester is the chairman run over by a plot. Johann sweats. Glenda is the sniper. Team Green Fury/Vent are the dungeon recon in armor. Raphael is the anti-Greed radar.

That Time I Got Reincarnated as a Slime promo art Season 4 Episode 6
Promo art. © Fuse / Kodansha / Eight Bit / Tensura Production Committee

World Building

Council sessions can be hijacked by a prince plus an Elder. Domination orbs exist and do not work on Rimuru. Assassinating your own prince to frame a Demon Lord is an Elder tactic. Engrassia’s king can reverse a conspiracy if he arrives in time. Membership terms can be rewritten after a public fiasco. Holy swords still break to Tempest magic. Mental influence on a committee is a detectable attack, not invisible fate.

Nothing here is later-arc homework. If a name or rule is only teased, it stays a tease.

Animation

Chamber brawl, orb gag, Shuna versus Gaiye, a long-range kill interrupted. This is an 8bit action-politics week. Keep the room readable — too many named bodies. The stopped assassination should be the sharpest cut. Aegil’s entrance is the authority shot.

Kagex animation score for this episode: 8.5 / 10 — peaks vs average cuts, not a sakuga clip ranking.

Music and Voice Acting

Score 8.4. 8bit’s TV mix leans on Elements Garden sting + silence. Japanese track is the reference for Rimuru’s dual register (cute slime vs office-brain). Dub timing varies by season; don’t wait on it to judge the episode.

Hidden Details

  • The orb echoing Clayman/Milim is the show rhyming failed collars.
  • Saving Elric is how Rimuru beats a frame job without a speech.
  • Johann watching Gaban fall is the next Elder realizing the playbook is burning.

Best Moments

  • The Orb of Domination doing nothing useful.
  • Shuna taking Gaiye so Rimuru does not have to.
  • Aegil arresting the plot in his own house.

Pros & Cons

Pros: Specific to “The Council of the West” —

The Council episode that actually swings. Watch it. Tempest joins the West by surviving a kidnapping, not by signing a collar.

Cons: Requires earlier episodes. Viewers who only want climax fights may call the political / logistics scenes slow even when they are load-bearing.

Final Verdict

Kagex overall: 8.8 / 10

The Council episode that actually swings. Watch it. Tempest joins the West by surviving a kidnapping, not by signing a collar.

  • Story: 8.8
  • Characters: 8.8
  • Animation: 8.5
  • Music: 8.4
  • Enjoyment: 8.8

Shuna handling Gaiye was deeply satisfying. The failed frame is the Dragon Buster trick again, and I respect the rhyme. Aegil showing up is the rare competent dad in isekai politics.

What to Expect Next

Souei versus Glenda, a curse comes off, and Maribel’s name finally lands on the table.

Next: Season 4 Episode 7 — The Mastermind’s Identity. Watch legally on Crunchyroll.

FAQ

Do I need to watch Season 4 Episode 6?

Yes if you are watching the TV series in order. Skipping “The Council of the West” leaves a hole later episodes assume you have.

What is the Japanese title?

西方諸国評議会 — Crunchyroll English title is “The Council of the West.”

When did it air?

May 15, 2026 in Japan. ~24 minutes. Studio 8bit.

Is this Season 4 filler?

No. Tensura’s “quiet” hours are usually nation, diplomacy, or setup — not recap filler.

Where does this sit in the overall count?

Overall TV episode 78 of the main series (S1–S3 are 72; Season 4 continues from 73).

Should I watch Slime Diaries first?

No. Diaries is optional comedy. This review is the main TV track.

Where are character guides?

Tensura charactersRimuru, Veldora, Milim, and the Tempest officers.

Where are facts / spoilers for the franchise?

Fact and Spoilers on the hub. This episode page stays inside Episode 6.

Keep exploring

Your turn

Was “The Council of the West” a continue episode or a skip-risk for you? Favorite beat? Who should get the next character page?

Sources: Crunchyroll episode titles; Wikipedia list of Tensura episodes; official Tensura anime site.

Our reaction

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

8.8/10

Shuna handling Gaiye was deeply satisfying. The failed frame is the Dragon Buster trick again, and I respect the rhyme. Aegil showing up is the rare competent dad in isekai politics.

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