Star Guardian is a series of parallel universe skins in League of Legends that follow the story of a group of high school students who choose to become cosmic protectors and must battle cosmic enemies threatening the universe. However, they consequently learn of the anguish and perils associated with their newfound roles as self-doubt, desperation and the daily life of a high school student.

Quiet and reflective, Sona spends her time away from the Guardians as a composer of music... and her time with them as a fighter of incredible power, blasting enemies away with sonically charged starlight. Though she cannot speak, she always makes her voice heard through deeds... or her chatterbox familiar-slash-interpreter, Chiizu.