- Voice Actor (CV)
- Hiroaki Hirata
- Gender
- Male
- Age
- 22
- Role
- Supporting
- Identity
- Guild Master of 'Fuurinkazan', Salamander warrior in ALO, SAO survivor, and Kirito's most trusted companion in battle
Personality
Fiercely loyal
Bold and humorous
Bushido-driven spirit
Self-proclaimed ladies' man
Known in-game as Klein, Ryoutarou Tsuboi was the very first friend Kirito made upon entering the death game of Sword Art Online. He successfully led every member of his guild 'Fuurinkazan' to survival, a feat that speaks volumes about his leadership. In SAO II, he re-emerges as a Salamander-race fighter navigating the skies of ALO. During the Calibur arc, his unwavering bushido code drives him to help claim the legendary holy sword Excalibur. Time and again, Klein proves himself to be the most dependable ally and emotional anchor at Kirito's side.