Hunter X Hunter: Phantom Rouge Episode 1 -

Gon and Killua encounter a young puppeteer named Retz , who is eventually revealed to be a puppet of Omokage’s deceased sister. Meanwhile, Killua struggles with internal guilt and a fear of betraying Gon, triggered by "Soul Dolls" of his brother, Illumi.

The thief is revealed to be Omokage , the former #4 member of the Phantom Troupe (preceding Hisoka). He uses "Soul Dolls"—Nen puppets created from memories—to steal the eyes of living people to give his puppets sight. Hunter x Hunter: Phantom Rouge Episode 1

While the overall film is considered (non-canon), it incorporates a specific backstory for Kurapika based on a "Volume 0" prequel manga written by creator Yoshihiro Togashi. Gon and Killua encounter a young puppeteer named