Board Thread:General Discussion/@comment-108.50.230.106-20150608234952/@comment-25857155-20150621210807

I am personally inclined to believe that Weiss is the older sister, based on how much pressure she seems to have been under quite a bit of pressure to be as perfect as possible. My theory has her taking a lot of heat from her father to keep it off of her younger sister, which would actually give her something in common with Yang - the overprotective sister syndrome. This is my favorite theory on the topic.

The main problem with this idea is the almost complete lack of mention of Winter for most of the series thus far, along with the fact that Winter seems to work at the SDC already, indicating that Winter is either older, or had a falling out of some kind with Weiss. x.x