Siena was a leading orangutan from Ape City eight years before Taylor's arrival, and the wife and advisor to Dr. Zaius. She was with their daughter Valentina when the Moon was destroyed and though they survived drowning, Valentina soon died in childbirth. Siena helped Zaius overcome this loss and start to rebuild Ape City in the face of major unrest, but was killed in an abortive coup by chimp radicals.



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