Mew Fumizuki arrives on Earth as one of two alien androids disguised as high school students, tasked with planetary defense. She and her partner consistently display reluctance towards this duty. Her short blue hair and cyan eyes maintain her human cover.

Personality-wise, she contrasts her more outgoing teammate, presenting a quieter, more laid-back demeanor. Despite this calm exterior, she possesses physical strength equal to her partner. Both frequently prioritize leisure—like eating ice cream or bickering—over defense missions, needing external prompting to act.

Their operations often cause substantial collateral damage. To protect their secret, they threaten classmate Akai—who discovered their true nature—with severe consequences if he talks. They occasionally leverage his knowledge for minor errands. Another classmate, Shouko, actively investigates them, unaware they are androids.

Their narrative consistently portrays them as unconventional, unreliable protectors, blending formidable alien capabilities with recognizably human flaws and priorities.