Madness (発狂, Hakkyō) refers to the spectrum of behaviors characterized by certain abnormal mental or behavioral patterns.[1] In the world of Soul Eater, however, Madness also takes the form of a force, able to influence an individual in a plethora of ways mentally or even physically.[2]


According to Franken Stein, every being in the world of Soul Eater has a bit of Madness within them, however small that it might be, within the souls.[3] Due to the nature of the Madness Wavelength, those who emit a particular type of Madness can sway the Madness within an individual.[4] In addition, Madness itself is contagious and is able to spread itself through even the world.[5] Madness itself, if left unchecked, can take a hold of even the general populace of the entire world, possibly arousing the evil within an individual or boosting its hold over them.[6]

Influences on personality

Madness can manifest from things seemingly inoffensive or senseless. For example, Kid's obsession is due to the Madness of Order influencing in which, when fueled, prompted Kid to think he should erase everything for the perfect sense of order.[citation needed] Another example is Black☆Star's desire for power without any important reason. This is somehow linked to his father, White☆Star, as he took the Path of the Demon.[citation needed] Both cases however show that Madness can manifest from obsessive and otherwise uncontrolled thoughts or beliefs, but can be prevented, if guided or restrained properly.

Madness Wavelength

Main article: Madness Wavelength As stated by Stein, every person has a little madness inside them. But select individuals not only have Madness, but emit a powerful Madness Wavelength capable of influencing individuals to perform certain actions depending on the the type of Madness Wavelength.[7]


  1. Soul Eater Manga: Chapter 18 — While this is Wikipedia's definition, this chapter does imply it is taken like the real world's definition of madness.
  2. Soul Eater Manga: Chapter 19
  3. (Yen Press)Soul Eater Manga: Chapter 23 Page 20— Stein:Every person has some madness inside them, however small that amount might be.
  4. Soul Eater Manga: Chapter 23 — Stein:Every person has some madness inside them, however small that amount might be.
  5. Soul Eater Manga: Chapter 23 — Stein: And Madness is contagious. There can be no doubt about that.
  6. (Yen Press)Soul Eater Manga: Chapter 23 —
    Justin Law:If I may ask, what problems could this "Madness" cause?
    Azusa: Maybe awakening the evil inside people, or boosting it's hold over them...?
    Stein: Right again.
  7. Soul Eater Manga: Chapter 23

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