User blog comment:ElectricEnder222/RWBY Volume 3 Soundtrack/@comment-3257939-20141204025205/@comment-24435688-20141204054842

It depends on her age. It's heavily implied (at least to me and some other people) that this song pertains to the one who killed Summer Rose or was at least associated with her death.

If this is Cinder's song, then she had some connection to Summer and may have had a hand in her death. However, if she's any younger than 30 years old, then this wouldn't make much sense.