Commandant Mele-on Grayza, played by Rebecca Riggs, is a Sebacean female who has risen through the Peacekeeper ranks to achieve the status of Commandant. Politically astute and ruthlessly ambitious, she will use anyone or anything at her disposal to achieve her goals. To this end, she has had a gland implanted in her chest that secretes a substance known as Heppel oil, which she uses to bend her (male) victims to her will. A drawback to the gland is that it severely lowers her lifespan. To what degree it is lowered is not explored.