Konno Yuuki (紺野木綿季, Konno Yūki), known as Yuuki (ユウキ, Yūki) in «Serene Garden»,«Asuka Empire», «Insect Site», and «ALfheim Online» (ALO), was the deuteragonist of the Mother's Rosario, and the protagonist of the Sisters' Prayer side story in the Sword Art Online series. She was one of the three founders and the 2 leader of the «Sleeping Knights» guild, a group of terminally ill patients who met in Serene Garden, a virtual hospice for the terminally ill, and played various virtual reality games as a form of palliative care.
Eventually, Yuuki and her guild arrived at ALfheim Online, where she became known as Absolute Sword (絶剣,Zekken) due to winning sixty-seven consecutive duels on the street, including one against Kirito. She was also known for creating the eleven-hit Original Sword Skill named Mother's Rosario in the game. She spent her last moments of life while logged on to ALO in Asuna's arms, surrounded by her friends and more than a thousand other players.