Ran-Mao's cold, emotionless, and taciturn, as she hardly ever engages in a conversation. However, she's deeply loyal to Lau and acts only when instructed to by him. Though she's technically not related to Lau, he claims she's his sister since she's known him since they were very young. Ran-Mao possesses some flirtatious tendencies, and usually, under Lau's orders, she'd attempt to use her sexuality to attract someone's attention. Before, at one of Ciel's parties, she'd triflingly courted an important guest; Lau attributes her flirtatious behavior to the fact that she's a "pampered child." Ran-Mao's name translates to "blue cat" in Chinese, and Lau refers to her as his cat....