Mūma is a young girl who serves as a central figure in the struggle against the despotic Ventika empire. She possesses a frightening potential that makes her the key to overthrowing the regime, but she is suffering from memory loss and is incarcerated in a maximum security prison. The rebel planet known as G.P.P. discovers her existence and sends their elite agent, Kate, to rescue her and protect her. Beyond these established facts, specific details about Mūma’s personality, personal motivations, or the nature of her abilities are not documented. Her primary role in the story is as the initial rescue target, and her relationship with Agent Kate forms the catalyst for the larger mission. No further character development or notable abilities are described in available sources.