Board Thread:General Discussion/@comment-26208943-20150224183255/@comment-1211308-20150315163424

 I have also liked to think this was the case because I assumed, when Steven was created, half of his essence came from Greg and half came from Rose.

 Rose Quartz is a very old and extremely powerful, skilled, charismatic gem so I can't imagine, if Steven were holding the entirety of Rose in himself, that his human side would stand a chance of manifesting itself; His humanity would be overwhelmed by the force of the full Rose Quartz presence.

 Additionally, Steven is a manifestation of the love shared between Rose and Greg so I think Rose would want Steven to be equal parts Greg and her. As we've recently learned, when two gems love each other, they will give up the whole of themselves to fuse with the whole of their partner to form a completely new being that is stronger than either but equal parts both of them. Conversely, a very, very basic approach to the concept of human reproduction is that a child is formed through the union of half of each parent's DNA into a full person. Therefore, since Greg is biologically limited to only being able to provide half of himself, Rose would have to match Greg and only contribute half of herself for Steven to be an equal union of the two.

 So, if this is the case, Lion could simply be the byproduct of this human-gem fusion process. He could be just the excess parts of Rose that didn't go into Steven, which could also serve to explain Lion's inconsistent behaviour. If Lion is the manifestation of excess Rose then he wouldn't be a complete being and wouldn't have many of the full personality traits of Rose.

 ... But, this is all just my personal theory. It pleases me to think this way and I thought it was a decent enough theory to share but I'm not married to the idea and would just as easily accept others if and when they are demonstrated in the series.

 I just want to end off with one little notion that occurred to me as I was writing this. If Steven is equal parts Greg and Rose then he would be even-steven~ ;P