Piaget Serpentine forms one half of the Serpentine Sisters, twins within the Fraternity—an elite cadre of Topless pilots. As the oldest surviving Topless, they pursue the preservation of their eroding powers by harvesting Titan’s exotic matter to activate a dormant "fluctuating gravity well," later unmasked as a primordial space monster. This entity becomes both their hope for defying the natural decline of Topless abilities with age and an existential peril unleashed upon humanity.

Their physics-infringing abilities allow particle and quantum manipulation, entropy reversal, and aether-derived light generation, wielded to reshape reality itself. A forehead seal acts as a necessary limiter, curbing these powers when not deployed. At full capacity, they command the Buster Machine Quarante-Deux, a mechanized titan capable of relativistic velocities, mountain-shattering force, and lifting continents with Class M strength.

Driven by dread of losing their symbiotic bond and waning influence, the sisters’ gambits spiral beyond control. Their attempt to harness the Titan entity inadvertently triggers catastrophe, compelling allies and adversaries like Lal’C and Nono to intervene against the chaos.

Rooted in the Fraternity’s shadow operations, their history intertwines with covert Solar Defense Force conflicts and cutting-edge technological manipulation. Though their origins remain veiled, their longevity as ancient Topless cements their role in humanity’s ceaseless war against cosmic threats.

Their desperate arc climaxes in a reckoning where their schemes collapse, exposing the hubris of clinging to power at any cost. The aftermath unravels deeper truths about Buster Machines, space monsters, and the burdens inherited from past battles. Their story becomes a cautionary testament to power’s fragility and the sacrifices demanded to safeguard bonds that transcend mere survival.