She is a girl used by the speaker to pretend to be the idol singer Lax, who has disappeared from the public since the end of the First World War. She obtained the same appearance as Lax through plastic surgery. Her personality is more innocent and lovely than Lax herself. Mia, as Lax's body double singer, is deeply supported by people who don't know the truth. She is also a fan of Lax and has a good impression on Aslan. However, her long experience of playing others has made her more and more confused. Later, she attended the Los Angeles International Airport.