2x13 - Arakawa Under the Bridge

Although Sister puts up a valiant defense against Maria's physical attacks, her insults help her win. Although her royal decree turns out to be to make the residents make clothes for her sheered sheep, she forces Ric, Star, Sister and Last Samurai to be sheepdogs. Afterwards, the residents send their wishes down the river. When Nino's wish for everyone to be together forever gets stuck in the middle of the river, Ric paddles out and frees it for her, reassuring her of that promise.