Go Eun Byul is a fictional character from the South Korean television series Who Are You: School 2015. She is portrayed as a bright and confident high school student who has a strong sense of justice. Eun Byul is known for her leadership qualities and her ability to stand up for her friends. In the series, Eun Byul's life takes a dramatic turn when she goes missing, leading to a complex storyline involving her twin sister, Go Eun Bi. The show explores themes of identity, friendship, and the challenges faced by teenagers in school.