Plashef is a cultivator of Hellas on the planet Mars. Like the other Martians, he fled into the Dream-World when Raxachk's plague started to kill them all. When the Avatar met him in Martian Dreams, he told the hero how he had hidden away seedlings for the growth of new bodies after the plague would be over. Plashef also explained parts of the procedure for the growth of the seeds to the Avatar.