Rapa Nui Pasqua is the leader of the Pumpkin Pirates that was trapped in Ape's Concert for 50 years. After the escape, he joined the Marines.
Anime Filler Character
Since the story of the Rainbow Mist involved time travel. Rapa Nui is a character that was shown as both a child and an adult. This required different voice actor for the role. The English version used the same voice actor for both the young and older version.