Scent of Danger! the Seventh Member Is Nico Robin!

One Piece: Episode of Skypiea · Episode 130 · “Scent of Danger! the Seventh Member Is Nico Robin!”

The special will be the first in the "Episode of" series to cover the Skypeia arc, and will feature a character who did not appear in the original Skypeia arc from the anime. (Source: Anime News Network)