Unknown (real name Saeran Choi), is one of the main antagonists of the Mystic Messenger. He is the identical twin brother of Saeyoung Choi and a disciple of the organization Mint Eye. During visual novel sequences, prior to the revelation of his identity, his name would be displayed as three question marks (???). In Another Story, Saeran continues to use the screen name Unknown, but now goes by the alias Ray. As of January 31, 2018 he is able to be romanced as Ray in Another Story.