Both of them became stationed on the newly developed battleship Minerva from its launch through the Second Alliance-PLANT War. Lunamaria became a red coat mobile suit pilot, while Meyrin became the CIC officer. Meyrin was born with her sister, Lunamaria, on one of the PLANT colonies and they both entered ZAFT. She has also been shown to be skilled or at least capable of using firearms.
She was trained to delegate information between the bridge, the MS pilots, communications between Minerva crew members for tactical coordination, and their complex launching procedures with professional efficiency. Her greatest asset is multi-tasking in tactical coordination and hacking systems. Meyrin is the youngest member of the bridge crew, but she supervises the ship's mobile suits and communications. Upon meeting the real Lacus, Meyrin would be more relaxed, and it is indicated in the Omake Quarters that the former idol is among the few Meyrin is truly able to open herself to. Since their early days, Meyrin and Lunamaria were great admirers of Lacus Clyne, but this led to conflict when they competed with the fake Lacus for Athrun's affections. Also like her sister she has what seems to be a one-sided crush on Athrun Zala, however due to her shy nature she is unable to express herself. Despite this she does maintain a friendly relationship with everyone on the ship but only seems to hang around her sister more than anyone else, however despite her closeness to her sister Meyrin carries somewhat of an inferiority complex to Lunamaria this seen when Lunamaria is in the shower and Meyrin tries on her miniskirt and is annoyed when it doesn't fit her. In contrast to her sister who is cheerful and open, Meyrin is shy and somewhat closed off even from her own sister.
3.2 On the Minerva: Attraction to Athrun.