Yukari Sakuragi is one the class officers, the other being Kazami, of Yomiyama North Middle School's 9th grade class.
After hearing an important message from a teacher, she takes her umbrella and runs out of the classroom. After seeing Sakakibara with Misaki standing in the hallway she runs to the opposite direction. She runs downstairs and slips. Her umbrella falls out of her hand and she falls on it with her throat being pierced by the iron point of her umbrella and dies a few seconds later. We find out later on that her mother died on the same day, which could have been the reason why Sakuragi had left the classroom.
Yukari's appearance in the manga is completely different from her appearance in the anime. In the manga, she has straight black hair. However, in the anime, she has curly brown hair.