[While it's always a good sign that she's inspired emotion with her music, it still strikes her a little to see the tears. She smiles a little reassuringly at Sansa, though it falls a bit at the question.]

Thank you. And...no, you weren't. [She muses for a moment on how much to say before deciding to come clean. Tsubasa is no longer in danger from it, no matter how much she says.] In my world, that song was a duet. The person who would have sung it with me was here for a while as a shinki, but she disappeared these few days past.