Yuriko Yamaguchi Yamaguchi Yuriko? born November 21 1965 is a Japanese seiy who was born in Osaka. Previously affiliated with 81 Produce she is presently as of August 2006 employed and represented by ViVo. She is best known for her role as Nico Robin on One Piece and Nurse Joy in Pokemon. Her voice acting coach was the late Hitoshi Takagi. Her hobby is overtone singing. Her nickname is Yuruko. Yuko Kobayashi is currently filling in as the voice of Nico Robin and Kikuko Inoue is currently filling in as the voice of Nurse Joy while Yamaguchi is on maternity leave. Her blood type is B.