This has to do with mainly the entity that is supposed to accompany Link in some way throughout the game, and the resemblance to the design of the shields. Zordiana or Adelle, is the spirit of the Skyward Sword. My first thought is that this is an origin story since it has been said the Skyward Sword will become the Master Sword. However, the entity resembles a few things I’d like to point out.
 If you look closely at the girl, you notice she doesn’t have arms, instead, she has a cloak type thing. This leads me to believe her cloak thing, is actually wings.Also, when you look at her legs, they kind of look bird like when you look closely at the pattern. What else has important wing symbols on it?
 Now we all know about the mysterious bird symbol on the shield, but what’s weird about the Minish Cap one is that it looks like it’s in a more humanoid form. Some people think that Minish Cap is first in the timeline, and isn’t Skyward Sword supposed to be the oldest tale so far? “ The tiny Picori appeared from the sky, bring the hero of men a sword and a golden light” Yes, I know the entity doesn’t have horns, but it still bears some similarity.
 Now that one is from Wind Waker and it looks a bit strange, yes it’s a humanoid form, but it doesn’t look anything like the entity from the head up.
 However in this one, the head bears resemblance in the shape, but the body is completely wrong.
Since I think Skyward Sword is an origins story, I think it might bring about the origins of the symbol on the shield in some way. Now, I think I might be a little stretching here, but what do you think?
 If you look closely at the girl, you notice she doesn’t have arms, instead, she has a cloak type thing. This leads me to believe her cloak thing, is actually wings.Also, when you look at her legs, they kind of look bird like when you look closely at the pattern. What else has important wing symbols on it?
 Now we all know about the mysterious bird symbol on the shield, but what’s weird about the Minish Cap one is that it looks like it’s in a more humanoid form. Some people think that Minish Cap is first in the timeline, and isn’t Skyward Sword supposed to be the oldest tale so far? “ The tiny Picori appeared from the sky, bring the hero of men a sword and a golden light” Yes, I know the entity doesn’t have horns, but it still bears some similarity.
 Now that one is from Wind Waker and it looks a bit strange, yes it’s a humanoid form, but it doesn’t look anything like the entity from the head up.
 However in this one, the head bears resemblance in the shape, but the body is completely wrong.
Since I think Skyward Sword is an origins story, I think it might bring about the origins of the symbol on the shield in some way. Now, I think I might be a little stretching here, but what do you think?