Worren was elected Piper of the Plume Tribe sometime before the series, and given all their power subsequently.
Cavern of the Fear
Worren had Glock and Jasmine captured when they found their way into the underground sea. He planned to sacrivice them both to the Fear, in hopes that the beast would not ask for another sacrifice for twice as long as usual. When Lief and Barda then arrived, Worren was convinced by Nols to allow them the chance of ridding them of the Fear. However, he refused to provide them with light to see with. This prompted Nols to denounce him as Piper, recalling all his past failings before the entire Plume tribe. She later became his successor.
It is unknown what happened to him after Nols became Piper.
Physical appearance
Worren had the large ears, nose, and pale skin of all Pirrans.
Personality
Worren was a greedy and cowardly ruler, who sought only to better his position. He was also highly misstrusting of strangers, and like all Plumes, he despised the Aurons and Kerons.
Abillities
Worren, having all the powers of the Plumes, could light the caverns around the island. He may have also been a talented musician in order to become Piper.