One Piece "3D2Y": Overcome Ace's Death! Luffy's Vow to his Friends

The special takes place during the two year before the Straw Hats reunite on Sabody. Luffy is currently in Rusukaina training to get stronger to take on the New World. However the training is interrupted when Hancock's sisters, Marigold and Sandersonia, are kidnapped by the Byrnndi World, a pirate who was locked away on Level 6 of Impel Down but escaped during Luffy's invasion to save Ace, in order to lure Hancock to him and use her as a hostage against the World Government due to her Shichibukai status. Thus Luffy and Hancock head off to confront him and save Hancock's sisters.

Felecia Angelle

Perona

Mayumi Tanaka

Monkey D. Luffy (voice)

Greg Ayres

Cabaji

Akemi Okamura

Nami (voice)

Hunter Barnett

Vista

Bin Shimada

Byojack (voice)

Arata Furuta

Byrnndi World (voice)

Ed Blaylock

Sengoku

Fumihiko Tachiki

Akainu (voice)

Duncan Brannan

Mr. 3

Hiroaki Hirata

Sanji (voice)

Luci Christian

Nami

Hirohiko Kakegawa

Dracule Mihawk (voice)

Hiroshi Naka

Monkey D. Garp (voice)

Kappei Yamaguchi

Usopp (voice)

Ikue Otani

Tony Tony Chopper (voice)

Kazuki Yao

Franky (voice)

Kazuya Nakai

Roronoa Zoro (voice)