This information exchange ability is the ability of Sigma.[1]


Upon contact with another person, the ability allows Sigma to exchange the information he wishes to know most with the information the other person wishes to know most.[2]

As a side effect, the person that Sigma exchanges information with may experience momentary loss of consciousness as a result of a possible information influx. For example, Atsushi Nakajima once collapsed after Sigma apparently used his ability on him to transfer information about the page's location being held by the Decay of Angels. Ango Sakaguchi conjectured that his brain might have temporarily surrendered consciousness to sort the large amount of information, a similar experience that his own ability also caused before.[3]


Manga Appearances
Chapters in which the ability appeared/used

Decay of Angels Arc


  1. Bungo Stray Dogs Manga: Volume 18.
  2. Bungo Stray Dogs Manga: Chapter 58.
  3. Bungo Stray Dogs Manga: Chapter 79.

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