Sable

Sable is the quieter one of the Able sisters. Compared to Mable, she is super quiet. She basically sits behind her sewing machine all day while Mable does the sales.

Her Secret Past
As revealed in Wild World, Tom Nook was her childhood friend. When Tom went to the city to become a buisnessman, Sable probably was very depressed. In City Folk, it is revealed that Labelle, the clerk in GracieGrace is actually the third Able sister. When Labelle left for the city, Sable and Labelle got into a fight and that's why Sable never mentions her.

Her Role in the series
Being the eldest Able sister, she takes responsibility for the store and sews all the clothes that are on display to buy at the shop. While Mable is very happy and kind, but Sable is incredibly nice once she warms up to you.