Alice Zuberg is a pivotal character in Sword Art Online, specifically in the Alicization arc. She is a childhood friend of the protagonist, Kirito, and plays a crucial role in the Underworld saga. Initially presented as an Integrity Knight, Alice undergoes significant development throughout the series. Her transformation from a loyal knight to a fierce warrior fighting for her own beliefs is a key storyline. Alice's journey explores themes of identity, self-discovery, and the struggle between duty and personal desire, making her one of the most compelling characters in the series.