Alias No information Origin No information Occupation No information Powers/Skills No information Hobby No information Goals No information Type of Villain No information Akihiko Kayaba is the development director and Game Master of Sword Art Online. He is also the designer of the NerveGear, the Cardinal System and The Seed, as well as the main antagonist of the Aincrad Arc. He plays SAO as the leader of the Knights of the Blood, Heathcliff.