Ain is a member of the pirate crew of Z in the New World.
Ain is an antagonist in the One Piece series that was created by Eiichiro Oda. The series first began serialization in Shueisha's Weekly Shōnen Jump on August 4, 1997. He would later appear in the twelfth film in the One Piece franchise. Unlike with many other anime based movie spin-offs, Z is a character that is tied into the main One Piece canon. The film is directed by Tatsuya Nagamine, written by Osamu Suzuki, and Eiichiro Oda both producing and providing character designs. It was release in December 15, 2012.
Her first appearance is in One Piece - Episode 575 "Z's Ambition! Lily the Little Giant!", then in One Piece Film Z that was released in Japan on December 15, 2012. The voice performance for Ain in the Japanese series is done by Ryoko Shinohara.
One Piece Film Z
One Piece Film Z is the twelfth movie of the One Piece series, and the first to take place post time skip.