Isp and Osp are the two talking snakes who sit on the head of the mute demon Mosp. Mosp, Isp and Osp together make up a Medusa-like creature, with a female humanoid upper body, a snake-like lower body, sharp bone-spears for hands and two snakes for hair. Isp and Osp seems to have the same kind of personality. They get along with each other but often have a hard time convincing Mosp to their ideas, or understanding what she is doing.