Chamber arrives on Earth leading an alien trio assigned to harvest Dark Energy for their dying homeworld, driven by a desire to earn approval from her indulgent father, Brake. Her bratty, impatient, and bossy demeanor contrasts with her fervent mission enthusiasm. She commands comrades Clutch and Oiler with an underlying friendship and mutual respect tempering her leadership.

Initial strategies involve deploying Spinger monsters to gather energy, but these consistently fail: Spinger Gurugurun falls during their first clash with Earth Granners, Tirer proves too weak at Hamana Lake Speedway from inadequate power, and Gameleon is destroyed near Jono Station despite reaching level-two strength. These defeats highlight Chamber’s persistence but expose tactical flaws.

She later forges a temporary alliance with defectors Kakeru Kumaneko and Gao Granner Saber, offering aid against other Earth Granners in exchange for Saber’s Dark Energy—exploiting his refusal to use Earth Energy. The pact shatters when Saber gains self-regenerating Earth Energy, attacks the trio, and severs ties in what Chamber views as betrayal.

Her arc pivots upon detecting a Super Spinium reaction at Earth’s ancient sites. Dispatched by Brake to Stonehenge, her pendant activates a dormant robotic guardian awaiting her arrival. This unlocks Chamber’s latent power, enabling her to create Goleim—a Stonehenge-derived Spinewger. She wields it and the guardian’s might against Kuga but is defeated by his new Supra Type Change Tomica, forcing the guardian into extended repair.

Chamber evolves beyond brute force, deploying psychological warfare: She bombards Raiga and Kuga with rust to corrode their memories, trapping them in an illusion where they never became Granner pilots. This strips their powers and paralyzes their allies until their Gao Granners mentally reconnect, shattering the illusion.

Her background reveals no prior Earth ties, with her entire journey focused solely on planetary restoration for Brake’s validation.