Jinrai, a Frame Arms Girl defined by her proud demeanor and traditionalist outlook, harbors a deep fascination with the Sengoku period. Her combat expertise centers on swift ninja techniques, relying on agility and precision to wield bladed weapons while clad in lightweight armor tailored for stealth. Sharp-angled dark blue plating contrasts with short purple hair and an intense, disciplined gaze. An eye patch and ninja-themed accessories accentuate her connection to historical warrior aesthetics.

As the sixth Frame Arms Girl recruited by Ao, she navigates group dynamics with a steadfast commitment to traditional combat philosophies. Her interactions often showcase a rivalry tempered by mutual respect, particularly in strategic challenges. Though her origins remain undefined, her design and programming fuse principles of historical Japanese warfare with advanced mechanized capabilities.

Beyond the main series, Jinrai features in *Kyakkyau Fufu na Wonderland*, a compilation film reiterating her core traits through commentary and repurposed battle scenes. No alternate media explores her backstory or evolution further.