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Character:

Sayoko Shinozaki is a kindhearted Japanese woman who serves as a maid to the Lamperouge siblings in their residence. She was originally Milly Ashford's personal maid, but was reassigned to Lelouch and Nunnally when they were placed under the Ashfords' care. Her relatively benign appearance contrasts with her position as the 37th successor of the Shinozaki School of martial arts. She is a highly skilled martial artist and has matching athletic talents. She keeps a number of kunai strapped to her thighs and carries smoke bombs. She is referred to as a supermaid on her official profile.

Source from Wikipeida