At the end of Sword Art Online, all of the trapped players were presumed to be released from the game after years of being unable to logout. It was later revealed that Asuna, along with 300 other players, were trapped in the World Tree inside another game known as Alfheim Online. Asuna was forced to play the role of the Fairy Queen, Titania, by the fiancé her parents chose for her, Nobuyuki Sugou, who played the role of the Fairy King Oberon.
An actual cage to go with this Titania cosplay! I must say, I’m very impressed! And she looks like she has some wings too! Thanks to Michael for sending this in!
Source: SAO 52pk