Emi, the deceased daughter of robotics engineer Ryuuichi Narasaki, perished during a catastrophic malfunction of the prototype super-robot MI-6 2 Miroku—an incident that also cost Narasaki his left eye. Consumed by guilt, he withdrew into prolonged isolation, burdened by self-blame for the tragedy. This loss became the catalyst for his refusal to reactivate Miroku despite the existential threat of Negadon, with Emi’s absence haunting him as a psychological specter that fueled his resistance to revisiting his work. External pressures eventually forced his reluctant return to confront the past. Emi’s role remains rooted in backstory, shaping Narasaki’s internal conflict and sacrificial choices without expanded depiction in supplementary materials or alternate narratives. Her legacy exists solely through its impact on his decisions, anchoring his emotional trajectory.