Appears in <i>Rube Goldberg Machine</i> and briefly in <i>Tsuchinoko</i>. She is Hiroki's older sister. She shows up out of the blue, reminiscing about Hiroki's interest in building Rube Goldberg machines.
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Appears in <i>Rube Goldberg Machine</i> and briefly in <i>Tsuchinoko</i>. She is Hiroki's older sister. She shows up out of the blue, reminiscing about Hiroki's interest in building Rube Goldberg machines.
