Yuuko Nishi is a main character in the anime series A-Channel. She is a high school student known for her tall stature and gentle personality. Often referred to as "Yuu-chan," Yuuko is a close friend of the other main characters, Run, Tooru, and Nagi. Despite her somewhat timid nature, she often finds herself at the center of comedic situations due to her reactions and interactions with her friends. Her role in the series adds a touch of warmth and humor, making her a beloved character among fans.