[johnishida]

Just watched it...

Spoiler for Episode 11:

I don't really think Matsuri will kill Aono... Why?

I don't think Yorito is the type of guy that would plan such things. After all, he did say to Aono that his wish was for her to be happy. Though, he also seems to have a promise with Matsuri to disappear together.

So, what I think mayl happen is: Matsuri may use the sword's powers to turn Aono into a human. Once on human form, Aono will lose her powers, meaning, Yorito will surely disappear and, since Takeshi made clear that for a Yaka to turn into a human a Yaka's life was necessary, Matsuri will also disappear.

This way, Yorito and Matduri disappear together though, there is no way Aono will be happy with Yorito gone so, perhaps, once she becomes human she will also lose her memories as everyone else did. Aono will probably live by herself and probably become friends with Mana and Koyori again. Who knows...

About everyone losing their memories... I do not think Aono did that. If she had done that then, why not just erase Koyori's and Mana's at once le she did to everyone else? Or, is the process of losing ones memories gradual? Meaning, the more memories you have with someone she longer it will take to erase them... After all, the ones who lost their memories about Yorito didn't spend as much time as Mana and Koyori did. Yaka's are inmune but, Takeshi did remember him so, maybe, it was Mayuko who erased everyone memories as a parting gift for Matsuri, Yorito and Aono?