The Machine Beast Mothership Fog Mother (機械獣母艦フォッグ・マザー Kikaijū Bokan Foggu Mazā) is the main antagonist of Kamen Rider J, an alien parasite in a gold cybernetic battle fortress who sent her three oldest children, Garai, Zu, and Agito, to obtain the ideal human sacrifice for their "to-be-born" siblings to feed on before devouring the rest of the human race. As a last effort to destroy J, she dragged him back into her body, but he got free and killed her with a Rider Punch before escaping as her machine body exploded.