Plashef, from Martian Dreams
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.
Unfortunately, by then the plague had poisoned the soil as well, so Plashef's plan didn't work. He finally returned to the real world in a robotronic body after Raxachk was defeated, and is probably still living on Earth.