Board Thread:Speculation House/@comment-4830106-20140808001942/@comment-209421-20140813130210

BenRG wrote: A definite possibility. 'The Transient Princess' is either Cinder or Yang's mother who may be involved in some very, very bad business given that Yang thought Junior would know her.

We can assume from Yang and Ruby's dialogue that the two of them were raised by their father, the one parent they share. So, it's quite possible that Yang's mother did indeed leave. In that case, I'm seeing Summer raising both Yang and Ruby until her death, or until the point where she left to fight, either one. That could be why Yang takes over the emotional burden of caring for her sister, as shown via Gold.

As a side note, I still want to figure out the chords to Gold, because I believe that the song would make a very good guitar ballad and/or lullaby.