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Daimon Shizuka (大門シズカ Daimon Shizuka) is the adoptive mother of Kaito Daimon who died before the events of the anime. She was a member of POG. Not much is known about her.
Shizuka has long, dark brown hair, tied in the back and brown eyes.
Shizuka alongside her husband died during an accident while trying to solve a Fool's Puzzle.