Makina presents as a full-conversion cyborg, retaining her original human brain and pituitary gland beneath a mechanical exterior. Her face features a distinctive monitor displaying fully digital expressions that shift to icons like an hourglass during calculations. Aquamarine-colored elements define her physical design, with later appearances adding cheek marks. Functionally, her arms transform into multipurpose weapons including an energy cannon that destroys police drones and a taser inducing temporary paralysis.

Her personality blends deadpan delivery with rapid-fire speech during emotional peaks. Impulsive actions—high-speed chases and violent confrontations—contrast her preference for solitary vintage video gaming. She habitually deflects responsibility, blaming friend Chiharu for shared legal troubles despite escalating situations like destroying police property during arrests.

Socially, she maintains a contentious yet enduring friendship with Chiharu, known since middle school. Their bond involves frequent bickering coupled with loyalty, evidenced by Makina physically confronting perceived threats to Chiharu. Later interactions reveal initial hostility toward newcomers—such as a physical altercation with Akane—dissolving upon discovering shared interests like mutual admiration for an idol singer.

Technologically adept, she navigates outdated systems like Milky☆Subway’s faulty AI, though her commentary inadvertently triggers consequences like the train’s accidental departure. Legal repercussions follow her actions, resulting in 17 arrests by the subway incident. During community service aboard the runaway train, her body sustains severe damage leading to disassembly.

Forced collaboration with fellow convicts gradually exposes her to broader social dynamics. While unapologetic for past behaviors, external critiques—such as Officer Ryoko’s admonishments about her aggression—hint at potential shifts in self-awareness.