Fi's not TOO tall, Malefor. The size comparison is using 10-yr-old Link, not the teenage Link we see in Skyward Sword. Probably if you brought her about 3 pixels down... She has a long neck, but not THAT long. Remember that for Minish Cap style sprites, you can see plenty of the tops of their heads, but not their legs very much (because of perspective and the angle at which the "camera" is set), so this would put Fi's crystal too low on her body.