The main heroine of the Tokimemo 3 series, Yukiko is a kind-hearted romantic girl. She has known the player since childhood and has harbored romantic feelings for him throughout the years. Unfortunately, she was somewhat of a wallflower (with glasses and pigtails), so the player didn't really notice her. However, she changes all of this upon entering high school, where she excels both in academics and in sports. Despite her shyness, Yukiko puts great effort into all that she does and thus becomes the most popular girl in school. She works part-time at a candy store and is very skilled at making confectioneries.