Ever since the very first piece of teaser artwork was produced for Legend of Zelda: Skyward Sword – long before it was even known as Skyward Sword, even – there's been discussion of who or what the sword would be. Eiji Aonuma has confirmed the sword does have a personality but you can rule out one possibility: it's not Princess Zelda.
Stating that the sword itself is the driving force behind Link's next adventure, Mr Aonuma says:
When that sword is actively guiding Link it actually transforms into a feminine figure. I wouldn't say that it's female per se but it's a feminine figure. It would be kind of nice to keep this a mystery, but I can tell you right now that it is not Zelda.
That's one theory down, 2,000 to go. With there being a relative lack of memorable feminine figures in Zelda history other than the princess, this could even be a brand new character to the series. Or could it be a returning face from old? Let us know your thoughts in the comments.