Why is Kimihiro Watanuki plagued by youkai and ayakashi?


From the start of the series, Watanuki is tormented by them. Is there a reason
why they "like" him so much?

  * It's his smell?
  * Some related parent (blood relationship)?
  * Unlucky?

What is the reason?




In the [first chapter](https://i.stack.imgur.com/2yrqq.png) of the manga, Yuko
tells him that spirits are attracted to his blood, eluding of his innate
powers.

In [chapter 89](https://i.stack.imgur.com/jgEyi.jpg), the Spider Queen
mentions that several factions were fighting over his right eye, because if
they make it their's (by eating it) it could multiply their spiritual power
several dozen times.

It would seem that Watanuki is so powerful everyone wants a piece of him.




In the [first chapter](https://i.stack.imgur.com/2yrqq.png) of the manga, Yuko
tells him that spirits are attracted to his blood, eluding of his innate
powers.

In [chapter 89](https://i.stack.imgur.com/jgEyi.jpg), the Spider Queen
mentions that several factions were fighting over his right eye, because if
they make it their's (by eating it) it could multiply their spiritual power
several dozen times.

It would seem that Watanuki is so powerful everyone wants a piece of him.

