Peachy, a survivor of Earth's post-apocalyptic wastelands, serves in Victor City's Mechacon mechanic combat 18th regiment—a defense force protecting the rebuilt community from external threats. Her background fuels her commitment to the unit. As part of protagonist Daigo Otaki's core group, she actively engages in missions against the antagonistic Madokuta organization.

Peachy harbors a one-sided romantic interest in Daigo, driving impulsive jealousy toward fellow female characters. She specifically misinterprets interactions between Daigo and Roset (Rose), convinced Roset shares her feelings. This fuels an ongoing imaginary love triangle within the group dynamic.

Her personality combines unwavering loyalty with frequent impulsiveness. Throughout the series' 73 episodes, Peachy maintains consistent involvement in defense force operations. She contributes directly to Victor City's survival efforts, collaborating on the evacuation strategy centered on the ancient alien ark Anno as threats escalate toward the narrative's conclusion.