Mousse is a long-time friend of Shampoo, though she might not view it that way. He has been in love with her for most of his life, but she finds him annoying at best. He can't see very well without his glasses, often mistaking someone for something else. He comes to Nerima in search of this "new fiancé" that Shampoo has, and he stays to attempt to woo his sweetheart. Shampoo rebuked his advances when they were children and this still holds true by Amazon law, even if he manages to defeat Ranma in combat, but he remains persistent. Now a waiter at the Cat Café, he turns into a duck thanks to his own Jusenkyo curse. When in human form, his clothes contain weapons of drastic proportions, including needles, chains, swords, bombs, household appliances, and just about anything else imaginable. In duck form, Mousse can hide knives in his feathers.