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Arc Almanac

21 Oct 2026Draft. Not yet checked against the books.

All series / A Certain Magical Index / Arc 36

Arc 36 of 66 in A Certain Magical Index

Arc 36: British Royal Family

In the story: 10–18 Oct

Arc name chosen by Arc Almanac, because the books don’t name it.

I’ve watched through

Index I stops before this arc.

Railgun stops before this arc.

Index II stops before this arc.

The Miracle of Endymion stops before this arc.

Railgun S stops before this arc.

Seen by the end of Index III.

Accelerator stops before this arc.

Railgun T stops before this arc.

Item (episodes 1–2; airing) stops before this arc.

What happens

Touma and Index travel to Britain as a magical incident exposes conflict within the country's ruling institutions. A struggle involving the royal family, the knights, and the church develops into a crisis over how Britain should face the threats around it.

Where it sits

Arc 36 in A Certain Magical Index
FormatVolumesUnitsLanguage
Light novel — A Certain Magical IndexVol 17, 18Volume 17, chapter 1 – volume 18, epilogueJapanese
Light novel — A Certain Magical IndexVol 17, 18Volume 17, chapter 1 – volume 18, epilogueEnglish
Manga — A Certain Magical IndexVol 27, 28, 29, 30, 31Chapters 165–196Japanese
Manga — A Certain Magical IndexVol 27, 28, 29, 30, 31Chapters 165–196English
Anime — A Certain Magical IndexIndex IIISeason 3, episodes 10–14—

Draft. Not yet checked against the books. Report a wrong mapping.