User blog comment:Firefunbro/Velvet's Team Speculation/@comment-7751467-20140410102759/@comment-3286116-20140410194526

As I edited in, the blade is too thin in my opinion to be that of a great sword. A glaive would allow for a fighting style we have yet to see at all, a great sword would be too similar to any of the other bladed weapons we've seen.

The blob sticking out of her is a strap from either her sleeves or (more than likely) a glove.

Also, I am now of the opinion that the weird handle/shaft thing sticking up out of the box is actually a bundle of arrows at different heights, which explains how the fletching could make the tooth-y shape on the side of it.