Chaos is an android created by the entity Big Gold before her destruction, functioning as a primary antagonist alongside his sibling, Cross. Together, they systematically invade planets across the galaxy, stripping resources and destroying them once their objectives are complete.

Serving as the strategic commander of their operations, Chaos directs armies of mechanical Geas and Void units. He typically delegates direct combat to Cross, who relishes physical confrontation, while orchestrating broader tactical maneuvers and resource extraction. His role emphasizes calculation and control, contrasting with Cross's brutality.

Their invasion of Earth targets the planet's defenders, the Iczelions—warriors formed through the fusion of human girls and sentient Iczel armor units. Chaos monitors battles from a command perspective, intervening to reposition forces or deploy advanced Voids when initial assaults falter. He displays a dismissive attitude toward Cross's impulsiveness, prioritizing efficiency over her combat enjoyment.

Following Cross's destruction during a confrontation with the Iczelions, Chaos abandons the invasion. In a final act of retaliation, he mobilizes all remaining battle units against Earth's defenders before retreating from the planet.

The radio drama *Iczelion* bridges continuity with earlier franchise entries, positioning Chaos and Cross as successors to Big Gold's legacy. Within this expanded lore, their campaign against Earth is framed as a direct continuation of the conflict initiated by their creator, consistent with Chaos's origins as an android.