Yin and Yang
Was Never So Much Fun
Some Crazy Chick From China
An uninhibited, acrobatic, ruthless, violent Chinese girl.
Fresh from the cursed spring, hungry Ranma and Genma to the Joketsuzoku village, the Jusenkyo guide led where Shampoo was defeating all challengers in their annual contest.
Ranma and Genma sat at a fully laden banquet table and gobbled down the prize. Challenged by the champion Shampoo, Ranma entered the contest and quickly defeated her. Then Shampoo gave this foreign girl the kiss of death, and pursued Ranma across China trying to kill her.
Shampoo arrives in Tokyo and follows a panda back to the Tendo dojo, where she meets the boy Ranma for the first time. Shampoo attacks Akane for hiding Ranma, so Ranma defends her... accidentally KO'ing Shampoo. But instead of giving the boy Ranma the kiss of death, Shampoo declares her love for him and calls him "husband"!
According to the scriptures of the Joketsuzoku, when defeated by an outsider, if it is a woman you give her the kiss of death and kill her, but if it is a man you marry him.
Ruthless with her rivals, she tries to make Akane forget everything about Ranma by brainwashing her with the special formula 110 shampoo.
Crushed when Ranma finally reveals his secret to her, she goes home and renews her training at Jusenkyo with her great-grandmother Cologne. Cologne knocks her into Maoniichuan, where a cat drowned 1800 years ago. Now assured that Ranma is truly a man, she and Cologne return to Japan and try to get Ranma to fall in love with her, by any means necessary, even magic.
Shampoo waits tables at Neko Hanten, her great-grandmother's Chinese restaurant, and delivers ramen by bicycle, occasionally running down people on the streets and rooftops.
Ranma ½ Info Site