Tadashi Momose is the 13th resource for the antagonists, and his symbiosis is six thousand years in the making. Now known as "Momoe," he has been transformed by aliens and an unknown organization against his will. He merged with an alien life form having changing him into a hermaphrodite with both sexual organs. His semen is capable of infiltrating the human consciousness and turn them into worker bees that serve their master. If desired, a parasite can be sent into a host to recruit help, such as Midori and Yuki and even the class president.