Jedite was the first of Queen Beryl's troops to begin the collection of energy for the Negaforce. He lured people into groups so that he could harness their Life energy (ie He held a cruise for lovers so that he could steal their Love energy). Unfortunately for him the scouts were too much for him to handle and Beryl grew tired of his failures. She banished him to eternal sleep and chose Nephlyte as his successor.
Here's a tid-bit for Jedite. While on the cruise Serena uses the Lunar Pen to transform herself into a photographer. She runs into Jedite (posing as the ship's captain) and he is actually nice to her. He wonders to himself why he is being nice to her, and can't figure out what the feeling that he had for her was. At least he had good taste !