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<b>Shampoo</b> is a 16 year old, Chinese Amazon from the village of Joketsuzoku near Jusenkyo. <b>Shampoo</b> first met <b>Ranma</b> when he (at the time a girl) and Genma ate a large feast which was intended for <b>Shampoo</b>. <b>Ranma</b> then quickly beat <b>Shampoo</b> in order to win the first prize meal. At this point <b>Shampoo</b> was very angry about her loss and gave <b>Ranma</b> the "Kiss of Death," a promise to track him to the ends of the Earth until she could kill him.

When she finally found <b>Ranma</b> he was living in the Tendo Dojo. Not realizing that male and female <b>Ranma</b> were actually the same person, she fell in love with <b>Ranma</b>'s male side. After he was able to defeat her, she gave him the "Kiss of Death," which when given to a member of the opposite sex, means that they are now engaged. Althought <b>Shampoo</b> only has eyes for <b>Ranma</b>, she is constantly pursued by her childhood friend, <b>Mousse</b>, who refuses to give up on her. No matter how many times she rejects him <b>Mousse</b> is always following her like a lost dog.

Another unique aspect of <b>Shampoo</b> is the way she speaks. Because she lived in China most of her life, her Japanese is very poor. In fact, during <b>Shampoo</b>'s first few appearances she spoke only in Chinese. By her next visit, she had also fallen into Jusenkyo and was now cursed by changing into a cat when splashed with cold water.