Yuuko Aioi

Yuuko Aioi (相生 祐子, Aioi Yūko), also known by her nickname Yukko (ゆっこ), is the main protagonist of Nichijou. She is an energetic high school student with short brown hair. Throughout both the manga and anime series, negative things sometimes happen to Yuuko, even if they logically shouldn't, but she always regains her spirit. When negative things happen to her, Yuuko is comforted by a dog named Buddy, implying a possible spiritual connection between the two. She lives in the Aioi Household.