Gender: Male
Birthdate: 1999-2000
Avatar Name: Klein
Age: 22-25
Height: /
Weight: /

Ryōtarō Tsuboi, also known as Klein, is a side character introduced in the beginning of the Aincrad Arc. He was the first friend that Kirito made in the game. Kirito invited him to join him and proceed to the next town right away. Klein refused to go with Kirito and decided to stay with and train his friends. He later on, after clearing the 3rd floor, founded his own guild named Fuurinkazan together with his friends who were waiting patiently for the game to be released and obtain the copies. Fuurinkazan was a green guild consisting of clearers and players who knew each other before the game started.

Klein looked very similar both in the real world as well as in SAO. He had spiky brownish hair that was held up with a red bandana. He was wielding red and black armor and used katana as his main weapon. According to Kirito, he resembled a samurai. In ALO, Klein looks the same as in SAO except for the red hair.

Eventually, Klein and his friends all became worthy front-liners. One time, they followed Kirito on a special quest to obtain the Divine Stone of Returning Soul, an item that can bring one back to life. They, however, were followed as well by the Divine Dragon Alliance. Klein and his members distracted the Alliance while Kirito confronted the boss and obtained the precious item. After finding out that the stone can only be used on a player that isn’t dead for more than 10 seconds, he gave it to Klein and left.

Klein appeared again in the boss fight on the 74th floor. By then, all of his friends were strong and well-trained. Guild members of Aincrad Liberation Force tried to take on the boss alone and suffered severe losses. Asuna, Kirito, and Klein’s guild helped the surviving members to escape.

During the Fairy Dance arc, after Sword Art Online was cleared, Klein re-established Fuurinkazan. The members of the guild, along with Kirito and Asuna, threw a party to celebrate the clearing of the game.

Ryōtarō`s Voice Actor/Actress: 

Japanese: Hirata Hiroaki
English: Kirk Thornton

Ryōtarō‘s Images Gallery