She appears as a lady that always wear knee-length skirt, a blouse, cardigan, and shoes.
She enters the shop and her wish is to learn cooking, due to the fact that she will be getting married soon. Yuuko says that this time, Watanuki will grants her wish by teaching her cooking, since he is an expert cook.
Yet, Watanuki finds that she is actually quite good in cooking. While questioned, she simply stated that all she wanted is to better her cooking skills, which simply isn't a reason enough for Yuuko to dispatch Watanuki on such a task.
However, it was immediately revealed where the problem lies: she refuse to try her own cooking, because she thinks that it's disgusting,