Excellent.

[she chews idly at one of her fingernails.]

The first piece of information - your suspicions were correct. There was no reason that I'm aware of for him to have used that locket this week. I lied to protect him, and I'm aware you weren't fooled, but it's better to clear the air that I don't plan to maintain the pretense.

The second piece of information - if there is someone among the people you speak to who is looking for revenge or simply seeking a convenient target whose hostage is secure, I would like you to also be aware that I am the one who killed Aikawa, and I was not possessed by a shadow. Clearly this is a greater level of culpability and will be more palatable for a potential killer as well.

[she is sort of standing awkwardly, a bit defiant but also putting on a bit too much haughtiness.]

Now, here is my question. You see, I was not aware before you pointed it out his locket was missing or any reason why that would be. And, interestingly enough, I also did not bring my locket to trial this week, when I did last week, a fact that seems to have slipped your attention.

You focused on the locket because you knew it was him. How, precisely, did you manage that?