To facilitate the problem of suddenly having a twin that no one knows about, D.D. decides to modify the memories of Tsubasa's father, making him believe he had twin daughters all along, and that Hikaru was simply living elsewhere with an aunt. Passing himself off as a visiting photographer friend, D.D. proceeds to monitor the Maguar from his ship, while Tsubasa and Hikaru live together at Tsubasa's house, go to school together at Tsubasa's school, fight together as Figure 17 against the Maguar, and essentially become siblings in a more emotional sense.