Asuna Yuuki is a main character from the anime series Sword Art Online. Known for her intelligence, beauty, and swordsmanship, Asuna is one of the top players in the virtual reality MMORPG world. Initially known as 'The Flash' due to her incredible speed and skill in battle, she becomes a key figure in the series, forming a powerful partnership with protagonist Kirito. Beyond her combat abilities, Asuna is also portrayed as compassionate and caring, often helping and protecting others throughout their adventures in the virtual worlds.