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Monarch: Legacy of Monsters Star Mari Yamamoto Breaks Down Keiko’s Journey, Monster Deep Cuts & Rodan’s Return [Exclusive]

May 9, 2026
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Monarch: Legacy of Monsters’ resident time-displaced scientist Keiko, portrayed by Mari Yamamoto, has been doing her very best to catch up to speed. In the 1950s, she helped form the Monarch organization to study Godzilla and other Massive Unidentified Terrestrial Organisms (MOTU). But during a mission gone wrong, Keiko went missing and was presumed dead.

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United States of America
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