Kouza Aiba is the father of Takaya, Shinya, Miyuki and Tengo. All of them were involved in the tragic things that happened after the encounter with the Radam spaceship in their expedition with the Argo. Rejected for being unsuited to become Tekkaman Kouza saves his son Takaya before he becames a tool to the Radam and sends him with a capsule towards the Earth telling his son to fight them back knowing that he has to kill his siblings and his friends.