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Mercenary (傭兵 Yōhei?) is the twelfth episode of the third season of the Toaru Majutsu no Index anime series. It was broadcast on December 22nd 2018, and was directed by Nogami Yoshiyuki, was storyboarded by Ochi Kojin, and the script written by Yoshino Hiroyuki.


An invasion by the knights? The chaos brought about by this fighting will be slashed by one man's sword. His name, William Orwell.

Adapted From

Major Events


By order of appearance:

New Characters


New Abilities


New Locations


  • The voice actress of the unnamed sister is Hirose Yuuki.
  • The voice actors of the unnamed knights are Maeda Hiroki, Muro Genki, and Satou Ken.
  • Their appearance in the movie notwithstanding,[1] this marks the debut of witches in the anime.


Cultural References

Differences in Adaptation

  • In the novel, when the Agnese Forces fought the knights at the yacht harbor in Edinburgh, it is said that Agnese's group was composed of 250 people and they were facing 700 knights,[3] but there were much fewer people shown in the anime.
  • This episode doesn't adapt the first part of the conversation between Laura Stuart and Elizard, which leaves a hint concerning Laura's age, because it is said in the novel that she and Elizard have known each other for a very long time.[4]
  • Villian, rather than being held by knights when she faced Carissa in the anime, was immobilized by fear in the novel.[4]

Animation Trivia

Ascalon shining blue.

  • Unlike in the novels, where Ascalon shines with different colors depending on the function of the blade which is being used, the sword's glow instead remains blue.[5][6]


# Title Time Scene & Notes
Oitsume Rarete Witches vs. Knights[7]
Gravitation Opening
Unverified Track
Feiku Searching for Princess Villian[8]
Semaru Kage Kanzaki vs. Knight Leader[9]
Jinmon Knight Leader prepares to execute the Third Princess[10]
Extraordinary Acqua save Villian[7]
Unverified Track Eyecatch
Boukyaku no Hibi Acqua and Villian[9]
Shinryaku to Shihai Hrunting[7]
Garake-Goshi no Kenka Koshi Touma and Floris[10]
Saikik Batoru Touma and Floris jumps to the river[9]
Heavenly God Acqua vs. Knight Leader[7]
Jigoujitoku Laura's hitchhiking plan[9]
Kakumei Zen'ya Ending
Gravitation (Preview Version) Preview

Unanswered Questions

  • Where is First Princess Riméa?


  • Villian: "You're late. You're late, you has-been mercenary scoundrel!" -said to William Orwell after he saved her.


This section requires expansion
  • "An invasion by the knights? The chaos brought about by this fighting will be slashed by one man's sword. His name, William Orwell."[2]



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