Charlotte Linlin

Big Mom (ビッグ・マム Biggu Mamu) is the last Yonkou to be named.

Appearance
Big Mom has not shown him/herself thus far, but his/her silhouette is visible in Garp's explanation of the Yonkou.

Abilities and Powers
As one of the Yonkou he/she is one of the three(formerly four) most powerful pirates of the One Piece world.

Trivia

 * Big Mom was the only one of the yonkou to not be involved in the Whitebeard war in any way.