Yukitsugu Sai known as Jellal in «Sword Art Online» and as Itsuki in «Gun Gale Online» is a reoccurring character in the Sword Art Online Series and a Major Antagonist in the Aincard Arc and the Main Antagonist in the Phantom Bullet Arc. He was one of the 50,000 players trapped in Sword Art Online. Where he was a prominent member of the «Knights of the Blood» While he is seemingly a calm and carefree player, Jellal is secretly on a constant search for something to excite him and is revealed to be a member of «Supreme Army» the Infamous Powerful Player Killing guild and the Right-Hand man of Zarc.