Mari Hanamura is a young girl who serves as a member of the international peacekeeping organization Unicorn in the 1967 tokusatsu series Giant Robo. She is described as extremely intelligent and is one of the standout members of the team. Her role in the story is primarily that of a supportive intelligence asset, using her sharp mind to aid in the fight against the terrorist group Big Fire. She works alongside Daisaku Kusama, the boy who controls the Giant Robo, and the agent Juro Minami, contributing to the team's strategic efforts. Mari is known by the codename U6 within Unicorn. Her personality is not extensively detailed in available sources, but her designation as exceptionally bright suggests a calm, analytical demeanor suited to her duties. She does not possess supernatural or combat abilities; her primary strength is her intellect, which she applies to problem-solving and supporting the group's missions. There is little indication of significant personal development over the course of the series, as she remains a steady, competent asset to Unicorn throughout. Her relationships with Daisaku and the other agents are professional, built around their shared mission to thwart Big Fire's plans. Overall, Mari Hanamura stands out as a gifted child operative who embodies the resourcefulness of Unicorn's younger generation.