Created by the late Big Gold, the android Cross traverses the galaxy alongside her brother Chaos, targeting planets for destruction and resource plunder. Serving as the partnership's primary physical enforcer, Cross relishes direct combat and the hunt for planetary defenders called Iczelions. She deploys powerful mechanical constructs known as Gears and Voids to execute attacks.

During Earth's invasion, Cross directly engages the newly formed Iczelion team. She takes distinct pleasure in overpowering opponents, specifically targeting the reluctant protagonist Nagisa. This culminates in a confrontation where Nagisa physically defeats Cross using the pro-wrestling maneuver, the back-drop. The sustained damage forces Cross to merge with a Void entity, significantly increasing her size and power. This merged form is ultimately destroyed by a combined attack from all four Iczelions. Cross's destruction concludes her role in the conflict, prompting Chaos to escalate the assault in retaliation.