A mech pilot of the Rubicon Liberation Front. As an infant, Ziyi was taken to Rubicon by her parents—who, tempted by the promise of riches from Coral mining, sought to make an illegal entry to the planet. Only Ziyi survived the crash landing. She came under the guardianship of Uncle Flatwell of the Rubicon Liberation Front, and the core of a mech was the orphan's cradle as she grew up to become a Coral Warrior. Her mech, YUE YU, an orange-and-mint oldgen biped with dual small grenade launchers.