You've probably all heard this theory before, but I wanted to cover it. For those of you who don't know, the Tsukasa is a Yorishiro theory is a theory in which Tsukasa is Hanako's yorishiro. First, we'll go over some pieces of evidence that prove this fact.

The first is the "meaning" of the yorishiro. The yorishiro is the most precious thing to a school mystery. For example, Yako's is a pair of scissors that Misaki gave her. The best way to figure out what Hanako's yorishiro is to figure out what's most important to him. And what could be more important to Hanako than his own brother? It's clear Hanako loves Tsukasa (though it's probably not a healthy form of it) so it's most likely that Hanako's yorishiro is a person he loves: Tsukasa.

Our next point is probably the most obvious: the seal on Tsukasa's cheek. At first glance you might just think it's a way to add similarities between Hanako and Tsukasa as shown here:

But if you look closer you can see that the seal is the exact same one as on the yorishiro.

But you may be thinking: "But Tsukasa's seal isn't the same as the one on the yorishiro! His is actually black and red while the yorishiro's is black and white!" But fret not dear reader, because that leads us to the entire reason I wanted to write about this theory in the first place: Sumire.

Sumire recently appeared in chapter 66 of the manga and was later confirmed to be No.6's yorishiro as shown by the seal on her neck, proving that people can, in fact, be yorishiros.

"But that still doesn't prove how Tsukasa's seal could be a different color!" is what you may be thinking. I'd like to draw your attention to the first few panels of Chapter 67: the colored versions of the last panel I showed you.

That's right. The color of Sumire's seal is red and black, just like Tsukasa's. Together, these pieces of evidence prove that Tsukasa is Hanako's yorishiro.

And that's the theory! Yeah that's it. Sorry it's so short and messy, but I really wanted to cover it. I swear next theory will be better. Anyway, feel free to share your theories in the comments below! Also, thank you all so much for 400+ reads! It really means a lot to me.