Not only 4 Sword Art Online Swords are popular, the anime and games also is welcomed by the young. If you are the fans, you may tell us which character are your favorite. Sword Art Online has some secondary characters also interesting and important. Now here display some introdutions for you to know.
Real name: Ryōtarō Tsuboi (壷井 遼太郎)
Voiced by: Hiroaki Hirata
A friendly player meets Kirito at the start of the game, who quickly befriends and learns from Kirito. They go their separate ways shortly after when Kirito leaves for another town to power level, while Klein remains behind to help out his less experienced friends. Klein uses a katana to fight and later becomes a leader of his own guild. He regularly meets with Kirito and his friends and occasionally joins them in quests in ALO, especially after the release of the World Seed.
Real name: Andrew Gilbert Mills
Voiced by: Hiroki Yasumoto
Agil is 180 cm tall with a muscular build. Despite his intimidating appearance, he is kind-hearted and spent most of his earnings to help players in the middle floors. Kirito is a regular in his shop and they are friends. Agil runs a shop named «Dicey Cafe» in the real world, which was run by his wife during his two-year coma. The cafe later becomes Kazuto and company’s meeting place in the real world.
Real name: Akihiko Kayaba (茅場 晶彦)
Voiced by: Tōru Ōkawa (Heathcliff), Kōichi Yamadera (Kayaba)
Akihiko Kayaba is the Director and creator of the Nerve Gear and Sword Art Online, as well as the main antagonist of the Sword Art Online arc. He traps all the players within Sword Art Online Sword by using the Nerve Gear to cease sending signals to the users’ body. Any in-game death or attempt at removal of the Nerve Gear would result in the real life death of the user. Later, it is discovered that he has been masquerading as Heathcliff, the leader of the Knights of the Blood Oath. Although he has the admin powers to make his avatar immortal, he is shown to be a powerful player even without his in-game immortality due to his intimate understanding of the Sword Art Online game mechanics which he himself had designed. He is defeated by Kirito at the end of Volume 1 and, at the end of Volume 4, leaves behind a program that grants Kirito the World Seed. His death was his own doing since he had also rigged his own Nerve Gear device to fry his brain when he was defeated.