Setsuna Yuki (優木せつ菜 Yuuki Setsuna), with the real name Nana Nakagawa (中川菜々 Nakagawa Nana), is a main character of the Love Live! spin-off, Love Live! Nijigasaki High School Idol Club. She is a second year student from the Nijigasaki High School, and a member of A・ZU・NA, a unit under the reformed Nijigaku, she also was the leader and co-founder of the original group.