Kikuko Inoue  

Inoue Kikuko is commonly known as "Onee-chan" due to her role as Tendou Kasumi in Ranma 1/2. This title has been used on her official site and various albums. According to her online profile, she believes that in a previous life, she was a fish, which led her to use fish as her trademark. Inoue made her debut in Hai Akko Desu in 1988 and consistently refers to herself as "17 years old" (井上喜久子１７歳です). While fans often tease her with "Oi! Oi!" ("yeah right"), she founded a group called Juu-nana-sai Kyou, or the Cult of 17-Year-Olds, to promote this ideal. Members of the cult include Yukari Tamura, Sakura Nogawa, Rina Satou, and Yui Horie.