The 300 year old great-great-grandmother of Shampoo. Cologne possesses all the secret knowledge of the Amazon martial arts and had planned Shampoo to be her successor. Faced with the truth about Shampoo's defeat at the hands of Ranma, Cologne returns with Shampoo to Japan intent on the marriage according to Amazon law. Like Master Happosai, she is also a foot and a half tall and is virtually undefeatable in combat. Her weapon is a staff, on which she does not hobble, but upon which she hops about. She is constantly plotting of ways to force Ranma to marry shampoo calling him ‘the groom' and "Son in Law' through what she refers to as 'training'.