MMA-055 Gemini

The NRX-055 Gemini was a mobile suit with a transformable mobile weapon design, built by the ESUN, and becomes young prodigy Maria Selene's mobile suit in Gundam Wing: Stone Serpent.

Technology and Combat Characteristics
Despite its apparent size and bulk, the Gemini's half-egg-shaped mobile armor mode was very fast and maneuverable thanks to multiple vernier thrusters and apogee motors. The mobile armor mode was equally capable of offensive and defensive operations, and it transformed into a non-symmetrical mobile suit form armed with a beam rifle and beam saber for standard one-on-one combat, as well as a powerful scattering mega particle gun mounted in its large left arm for attacking several targets at once.

The most useful weapon of all is the ZERO system found within the Gemini, 2.5. It loses the mental stress issues brought up by the earlier versions of ZERO, but made the system able to take over control of the suit sometimes. This can effect life or death situations.