TV-Series
Description
Tsuboi Ryoutarou, known by his avatar name Klein, ranks among the 10,000 players trapped in the death game Sword Art Online. He leads the clearing guild Fuurinkazan, which uniquely sustained zero member casualties throughout the Aincrad incident. After SAO's clearance, he continues as a Salamander in ALfheim Online.
In reality, Klein sports reddish-brown hair, brown eyes, and a signature red bandana. His SAO avatar mirrors this with spiky hair under the same bandana, samurai-inspired red and black light armor, and the katana "Karakurenai." His ALO form retains similar traits but swaps the bandana for black and yellow and adds a fiery cloak.
Klein first meets Kirito on SAO’s launch day, learning basic controls moments before the trapping mechanism activates. Declining Kirito’s offer to team up, he instead gathers real-world friends to establish Fuurinkazan. Throughout SAO, he aids Kirito during pivotal moments: the "Red-Nosed Reindeer" tragedy, the Laughing Coffin raid, and the decisive Floor 75 battle against Heathcliff.
Post-SAO, Klein attends the Aincrad liberation party and engages in multiple VR events: diving into ALO’s "Deep Sea Plunderers" quest, supporting Kirito against Death Gun by exposing Laughing Coffin ties, and spearheading the "Calibur" quest to save the NPC Freyja. During the Ordinal Scale incident, Eiji’s attacks break his arm and erase SAO memories, yet he still helps rescue survivors.
In Project Alicization’s War of Underworld, Klein converts his ALO account to enter the Underworld, sacrificing all character data and items to aid Kirito. He arrives with Leafa, Sinon, Agil, and allies to bolster the Human Empire against Dark Territory invaders and real-world assailants, reinforcing their defense.
In reality, Klein sports reddish-brown hair, brown eyes, and a signature red bandana. His SAO avatar mirrors this with spiky hair under the same bandana, samurai-inspired red and black light armor, and the katana "Karakurenai." His ALO form retains similar traits but swaps the bandana for black and yellow and adds a fiery cloak.
Klein first meets Kirito on SAO’s launch day, learning basic controls moments before the trapping mechanism activates. Declining Kirito’s offer to team up, he instead gathers real-world friends to establish Fuurinkazan. Throughout SAO, he aids Kirito during pivotal moments: the "Red-Nosed Reindeer" tragedy, the Laughing Coffin raid, and the decisive Floor 75 battle against Heathcliff.
Post-SAO, Klein attends the Aincrad liberation party and engages in multiple VR events: diving into ALO’s "Deep Sea Plunderers" quest, supporting Kirito against Death Gun by exposing Laughing Coffin ties, and spearheading the "Calibur" quest to save the NPC Freyja. During the Ordinal Scale incident, Eiji’s attacks break his arm and erase SAO memories, yet he still helps rescue survivors.
In Project Alicization’s War of Underworld, Klein converts his ALO account to enter the Underworld, sacrificing all character data and items to aid Kirito. He arrives with Leafa, Sinon, Agil, and allies to bolster the Human Empire against Dark Territory invaders and real-world assailants, reinforcing their defense.