I wanted her to be different from her stepsister, Bawang Putih, so I gave her curly hair since Bawang Putih has smooth wavy hair. And Bawang Merah's face is more pointy since Bawang Putih is rounder and chubbier. 

I've also simplified her hair more, by only giving her one ponytail.

And some sketches of her evil onions.