The childhood friend of Domon Kashu who assists him during the Thirteenth Gundam Fight as his engineer, tactician and medic. Rain is also capable of piloting the Shining Gundam and Rising Gundam on some occassions.
Rain Mikamura is Domon Kasshu's sole support crew member. She is a childhood friend of him and slowly develops romantic feelings for him as the plot thickens. She has various skills, medic, decent marksman, mechanic... the latter is her primary function as Domon's support crew. As Domon's crew she must put up with his brash, often rude manner for the entire series. She does this... although not always gracefully.Domon's partner, she secretly and gradually falls in love with Domon, as she was his childhood friend. She is his crew member for the Thirteenth Gundam Fight, and boasts many talents. She is a renowned engineer and tactician, a decent sharpshooter and a skilled medic/doctor. Determined, she manages to put up with a brash Domon throughout the series enough so they accomplish their mission and fall in love, in a sense. However, things start to change between them when she learns the truth from Schwarz about her father's involvement in the Devil Gundam incident. After that, however, she decides to go back to Neo-Japan, and ends up kidnapped and forcefully placed in the cockpit of the Devil Gundam by her former boss, Major Ulube. Only by the joint efforts of Domon, the other Shuffle Alliance members and their crew, as well as Allenby, and many other Gundam Fighters, was she freed; mainly because of Domon finally admitting his love to her, which allowed Rain to break her self-imposed emotional barriers and control of the Devil Gundam over her body. She also piloted the Shining Gundam on two occasions and later piloted the Rising Gundam during the Battle Royale. Rain Mikamura is voiced by Yuri Amano in Japanese and Jennifer Holder in English.
She becomes very jealous of Domon's friendship with Allenby as she sees Domon spending more time with her. It gets to the point where she argues with Domon and leaves, later appearing as the support crew for Schwarz Bruder of Neo-Germany. This makes Domon realize how much he really needed her and she goes back to his side with little complaint. When she finds out about her father's involvment in the conspiracy to frame Domon's father she aids Schwarz in escaping and pilots the Rising Gundam to Lantaru Island. While Domon is facing Master Asia and the Devil Gundam, Rain fights the infected Allenby who is piloting the Walter Gundam and is able to free her from the DG Cells. After the tournament is over she returns to Neo-Japan with her father as she feels unworthy of Domon's affection and all the pain her family put him through. After returning to the colony Major Ulube revelas his ture palns and uses her as the new core life unit of the Devil gundam. It is only after Domon fully admits his love for her that Rain is able to break the Devil Gundam's control over her body. As she is laucnhed from the Devil Gundam's body Domon catches her and uses his cape to cover her. Togethr they finish the Devil Gundam with the Bakunetsu God Sekiha Love Love Tenkyoken technique. After destroying it they returned to earth.
Rain is a renowned engineer, tactician, sharpshooter and a skilled medic/doctor. She is one of the few people ever seen operating a Gundam using the Trace System, as it is very painful for those that were not trained to withstand wearing the Trace Suit. She has piloted Shining Gundam twice and later operates the Rising Gundam against the Nobel Gundam/Walter Gundam during the finals of the Thirteenth Gundam Fight.