Charlotte Linlin

Big Mom (ビッグ・マム Biggu Mamu) is the last Yonkou to be named. Big Mom's name is revealed just after the Battle of Marineford and the death of the Yonkou Whitebeard.

Big Mom was also mentioned at the end of the Thriller Bark arc, the pirate captain Lola mentioned Big mom and gave Luffy a vivre card which would lead him to the yonkou if he so needed help in his voyage through the New World.

Appearance
Along with Kaido, Big Mom has yet to make an actual appearance, but the pirate's silhouette is visible in Monkey D. Garp's explanation of the Yonkou.

Abilities and Powers
As one of the Yonkou, Big Mom is one of the three (formerly four) most powerful pirates in the world.

Trivia

 * It is not yet known if "Big Mom" is an epithet or the real name.