Masayo Harajuku is a supporting character in Metal Fighter Miku. A former Neo pro-wrestler aged forty, she retains extensive connections within the Neo Pro-Wrestling world, notably with the celebrated coach Eiichi Suo and the reigning champion Aquamarine. Masayo is married to Tokichiro Harajuku, who originally founded the TWP as a talent agency; it was Masayo who persuaded him to expand into the Neo Pro-Wrestling business, leveraging her background and contacts to establish the organization. Her deep understanding of the sport and its key figures allows her to act as a behind-the-scenes facilitator for the Pretty Four, the young team striving for the championship. She is the one who recommends Eiichi Suo as their coach, a decision that proves critical to the team’s growth and Miku’s development as a competitor. While not directly involved in training or matches, Masayo’s motivation stems from her own history in the ring and a desire to support the next generation of fighters. Her role is primarily that of a knowledgeable and resourceful ally, using her network to open doors and solve problems. Masayo’s quiet competence and pragmatic guidance contrast with the more eccentric personalities around her, grounding the story’s business and strategic elements. Her abilities as a former wrestler are implied rather than showcased, as she appears no longer active in competition.