[There's only silence for a while before the device picks up a very faint sound, possibly that of Rei tapping her nails against a window pane. Since the sound is so far away, she's most likely unaware that anything is recording.
Which is made more apparent when she starts to
sing.]
Sleep, priestess, lie in peace...
If you cry, the boat you'll ride...the last trip to the other side
Once you get there, sacred marks you'll bear
T-they shall be peeled off should you fail to lie still...
[The singing continues.]