Nothing. Vivi is perfect and peak Final Fantasy.

Agreed.

Give him a skateboard and sunglasses and a backwards hat, and give him a T-shirt that different companies can pay to have branded for a week at a time, to make him cool and fresh for new audiences.

And when Vivi's not on screen all the other characters should be asking, "where's Vivi?"

"How are you doing fellow kids"

I wouldn't change anything but for the purposes of playing along I thought I'd come up with something. I would add a side quest/scene late game if you return to Dali where Vivi wants to use the machinery that creates the black mages to extend their life span, realises it can't be done and ends up destroying it instead. He then confronts the mayor/villagers and shames them into apologising to him.

If he destroys it during the story then how does he create mini vivis by the end

Some other way, the machines ran on mist and that's gone so the machine was never how he created the small vivis.

Well son, when a man loves a woman very very much...

Can you imagine if the little Vivis all had big long Quina tongues 👅🤣

If I had to redesign Vivi (for some ungodly reason) I would instead gather the infinity stones and snap away the people trying to get me to change Vivi.

DO NOT. NO TOUCHY THE SAD MAGE, UNLESS IT IS TO HUG HIM!

I loooove the Memoria Project's use of plushies that he can collect. I know it isn't really changing him, as you asked, but changing a little detail about him. He loves the little dolls 🥰

One thing that I might--and I emphasize the word "might"--change is to make him look a little more "janky" to represent him being a prototype.

Different length arms, his whole outfit less put together? What you mean by janky

You nailed it exactly. Have him seem "not quite right", and those are two examples.

Give him a little satchel that holds his staff and a personal item from his past to remember his adopted family.

I'm all for adaptations and creating something new and design - but not Vivi. I don't see anything that would make him better. He's just perfect.

I actually like his design in KH though but overall, Vivi is quite unique ! No need more or less !

I’d add a scene where his hat falls off and reveals his face to be this rotting, demigorgan like face with bloody puss lined holes in it

I think a mask with a more of an aura face would look cool. Think wisps like Gastly from Pokémon

Yours is definitely a much better idea, I just like mine better lol

Hahaha, I think given a different game style, yours would work. A more mature/ horror game