Ryoko Asakura is a beautiful and socially adept Data Overmind humanoid interface who served as Yuki Nagato's backup. She initially held a human identity and acted as a bubbly high school girl, but later revealed her true, unstable nature and tried to kill Kyon in an attempt to provoke Haruhi Suzumiya. She has long navy blue hair tied in a ponytail, blue eyes, and thick eyebrows.