The youngest and yet most intelligent maid in the Hanaukyo mansion. Cynthia rarely spoke during her younger years, and as she's transferred into the mansion she only communicates with loud breathings. Due to a tragedy in her younger years, her personality split, and she gained the alter ego Grace, who shows up at night when Cynthia's asleep to take care of computer and security maintenance. Cynthia enjoys tagging along with Taro, and she is the one to show him around the mansion as he first enters.