In the film, Kate McKinnon plays the Barbie doll that becomes the subject of child experimentation.
Shes the Barbie you gave a haircut to with your dull scissors from the dollar store.
The Barbie you decided to adorn with a face tattoo via Crayola crayons.

Kate McKinnon and Margot Robbie in ‘Barbie’ | Warner Bros. Pictures
You know the one whose legs are ceaselessly defying natural human physicality.
However, she is also the Barbie who knows about the real world outside Barbieland.
McKinnon explained:
I actually went to college with Greta…

I know that shes a genius.
She went on to note what theBarbiemovie is all about.
The Kens are extensions of the Barbies not individual toys existing outside her realm.

Margot Robbie in ‘Barbie’ | Warner Bros. Pictures
Barbiepremieres in theaters on July 21, 2023.

Flat Feet Scene ‘Barbie’ | Warner Bros. Pictures