这次一共四位女性，mira是黑的已经铁板钉钉了。akane个人觉得属于精明，phi虽然也有点精明但是比akane耿直。顺便说，我觉得sigma一直是大写的耿直，而且是那种follow your heart的个性。diana就是上述比起善良更像懦弱。
This is the timeline that leads to Virtue's Last Reward. Though the Post-Apocalypse files, Diana eventually moved in with Sigma on the Moon about 5 months after the end of the Decision Game. Together she lived with the Sigma consciousness that returned from the events of Virtue's Last Reward for about three years. During that time, Sigma and Diana fell in love with each other. Diana developed the Medical Pods used in the Nonary Game: Ambidex Edition, but even with her miraculous invention, Diana's health quickly began to deteriorate. Diana passes away peacefully in Sigma's arms as she dreams of another possible future where she lives out a full, happy life with Sigma.
After completing the Transporter Room, Diana and Sigma find themselves stuck in the Underground Facility since Akane had used the X-Door, thus preventing them from leaving themselves. With no way out, Diana and Sigma settle down and wait in hope that Akane will eventually return with help with ten months of food available to wait. At first, Diana takes things well, finding her time with Sigma to be pleasant and peaceful, free from the worries of the outside world. However, a month into their lock-in, Diana's stress begins to rise believing that Akane abandoned them. Sigma reveals that he knows about her past with her abusive ex-husband. She eventually drinks heavily and lashes out at Sigma for knowing things he should not. Fed up and after drinking heavily, Diana returns to the Transporter Room to cry by herself. Sigma eventually comes to her and finally opens up to her, saying that he was afraid of losing her, like the blue bird in the cage represented in her necklace.
Diana and Sigma confirm their love for each other and eventually sleep together, resulting in the birth of twins on November 16th, 2029. However, with no food left in their storage, Diana and Sigma decide to copy the twin's genetic codes into the Transporter devices in order to save them. Before starting the process the couple gives their children their names. Diana names their son Delta, after Sigma who is also named after a Greek letter as well as having a "D"-name like her. Sigma names their daughter Phi in honor of Phi herself and Diana gives her daughter Phi's brooch. Needing a safe point to transfer their children, Phi and Delta's codes are sent prior to Zero II acquisition of the devices, sometime before 2009. Diana and Sigma flip the switch, and pray that their children will live happier lives.