Yuuki Asuna, known as Asuna in Sword Art Online (SAO), ALfheim Online (ALO), and Project Alicization, is the deuteragonist of the Aincrad Arc in the Sword Art Online series, as well as the protagonist of the Mother's Rosario side story. She is the daughter of the former CEO of RECT Inc.. Asuna was one of the 10,000 players trapped in Sword Art Online, where she was the sub-leader of the «Knights of the Blood» (KoB) guild. Her skills with the rapier had her earned her the nickname "The Flash".
- She is voiced by Cherami Leigh in the English version.
- Asuna will meet Sora in Sora's Adventures of Sword Art Online.
- When she and Kirito first met Pooh and Friends, Brock flirted with her and got punched by Kirito.