Konno Yuuki

Konno Yuuki (紺野木綿季) was one of the players of «ALfheim Online». She leads the guild «Sleeping Knights», a group of terminally ill patients who play using the FullDive Technology MediCuboid. She is also known as Zekken, or Absolute Sword. She won 67 consecutive duels on the street, including Kirito, although Kirito was only using one sword at that time. Kirito stated that her reaction speed was even higher than his and she was much more immersed into virtual reality than he was. She spent her last moments while logged on ALO in Asuna's arms, surrounded by her friends and more than a thousand other players.

Background
Prior to becoming known as Yuuki of ALO, Konno Yuuki was a child suffering from "Acquired Immunity Difficiency Syndrome" (AIDS) since birth; her parents, as well as her sister (Aiko) were infected too. Despite this, she had always believed that one day she would be healed and continued to strive towards her goals. However, during the course of 4th grade, a group of students found out that Yuuki was a carrier of HIV (Human Immunodeficiency Virus) and began spreading rumors about Yuuki. Because of this, Yuuki was forced to transfer to another school. After transferring to a new school, Yuuki's condition gradually became worse and the reason suspected by her doctor was from the rejection caused by the parents and teachers of her old school. Her parents died two years, and her sister the year before the events of Sword Art Online and ALfheim Online.

Mother Rosario
She is first introduced as Zekken, a street swordsman offering an 11-hit Original Sword Skill, to whoever beats her. After fighting a sixty-seven battles, Asuna challenges her. Althogh Asuna loses, Yuuki is impressed and thus asks Asuna for her help in defeating the floors' boss. After two tries, the Sleeping Knights beat the floor. As time progresses, Asuna gets to know Yuuki in the real world. She even goes to great lengths to ensure that Yuuki can enjoy the "real" world again by asking Kirito to help her with the technology that he had been developing in school.

Skill/Abilities

 * High speed reaction
 * 1-handed Sword Skill
 * Mother's Rosario: 11-hit Original Sword Skill

Trivia

 * If Yuuki had played SAO, she's definitely would be the one who'll obtain the Dual Sword skill, as her reaction speed is faster than Kirito's, he also made a note of this once.
 * For being a Medicuboid user she's one of the few people with more playtime that the "survivors from the SAO incident", it's over three years.