Why didn't anyone in the school notice that Natsume is actually a female?


In the early episodes of Tokyo Ravens, Natsume is seen wearing a boy's
uniform. It is said that this is due to some customs in their family. As
quoted from Wikipedia
[here](https://en.wikipedia.org/wiki/List_of_Tokyo_Ravens_characters):

> As a family tradition, she has to present herself as male in front of other
> onmyouji families, a tradition that was created to hide the true identity of
> Yakou's reincarnation.

But why didn't anyone notice that she is actually a girl? Everyone except
Touji and Harutora who already knew her, assume that she's a boy.




There are several reasons why no one noticed that Natsume was a girl:

  1. She was dressing as a boy, therefore no one should suspect her.
  2. On the novel, an onmyouji can identify whether you're a girl or boy based on your aura. Boys naturally have yang aura and girls have yin aura.   
  
Normally, when a practitioner has a shikigami, the shikigami's aura should be
the opposite so that their compatibility will be in harmony.  
  
However, Natsume's prideful shikigami which is Hokuto have a yin aura,
therefore it made conflict in their auras, thus negating the yin aura and
making it a yang aura. In result, anyone would assume that Natsume was indeed
a boy.

  3. It is rumored that Natsume was Yakou's reincarnation, since she was the next heir of the Tsuchimikado family, they preconceived that she is a boy.

[![enter image description
here](https://i.stack.imgur.com/7V8y2.jpg)](https://i.stack.imgur.com/7V8y2.jpg)




There are several reasons why no one noticed that Natsume was a girl:

  1. She was dressing as a boy, therefore no one should suspect her.
  2. On the novel, an onmyouji can identify whether you're a girl or boy based on your aura. Boys naturally have yang aura and girls have yin aura.   
  
Normally, when a practitioner has a shikigami, the shikigami's aura should be
the opposite so that their compatibility will be in harmony.  
  
However, Natsume's prideful shikigami which is Hokuto have a yin aura,
therefore it made conflict in their auras, thus negating the yin aura and
making it a yang aura. In result, anyone would assume that Natsume was indeed
a boy.

  3. It is rumored that Natsume was Yakou's reincarnation, since she was the next heir of the Tsuchimikado family, they preconceived that she is a boy.

[![enter image description
here](https://i.stack.imgur.com/7V8y2.jpg)](https://i.stack.imgur.com/7V8y2.jpg)

