Mirei Mikuna is first seen early on in Chapter 1, celebrating and dancing on stage at the [[Allied Military Force]] tripartite treaty 100th anniversary. She quickly leaves when the SEED attack the fleet, and is not seen for a few chapters; she then reappears in Chapter 5, just surviving a flyer crash (there is a wreck and an injured Communion of Gurhal employee near where you find her). When you find her, she is fighting off three Tengohgs on a [[Image:Fest.png|thumb|right|Mirei, center stage at the ceremony]]plateau; it seems she either left the wreck uninjured or was abandoned there at word of her father. After the [[Onmagoug]] fight she thanks Ethan and Hyuga for saving her, and looks over Karen before fainting and being scooped up by Izuma and a few more Communion of Gurhal workers. She later appears in chapter 7, posing as Karen in an attempt to foil whatever her cohorts are planning against her; she leads Ethan and allies to the [[Hakura Temple]], and finds the computer system and also proof of what is going on. Upon leaving, the group are encountered by two Communion guards, at which point she turns back into Mirei; this doesn't faze them, and they attack the group. After being defeated, the group presses in lower, still being attacked by Communion guards. Eventually, they reach the main hall, where they see Dohgi preparing to kill Karen to finish what he started - Mirei, however, intervenes, and is knocked back by her father and killed in the process. After the fight, she shares some dying words with Karen (telling her to be happy and believe they're always together), and passes away.