KHBbS Terra and Ven's keyblade in final episode

[User17k 211]

I have a question, why in the end of the final episode does Terra and Ven's keyblade fly around Aqua and defeat the giant heartless, where do they come from?

[Wolf on the Run 391]

its ven and terras hearts protecting aqua and thats why the keyblades show up to protect her since she could not protect herself

[Keyblader 325]

its ven and terras hearts protecting aqua and thats why the keyblades show up to protect her since she could not protect herself

 

you know, i actually don't doubt that, that makes sense, but actually the last part isnt true, she could protect herself, she just was giving up

[heartless101 83]

she was about to give up but because of her bond with Terra and Ven, their keyblades defeated the darksides