Bayushi Kwanchai was the student of Bayushi Tangen and became only the second person to master his technique, the Dark Sword of Bitter Lies (after Tangen himself). He was a nephew of the Imperial Chancellor Bayushi Kaukatsu and served as his yojimbo. Prior to his appointment as yojimbo, he participated in many missions for his Clan which required a disruptive presence. His personality could be described as egotistical, rude, and less than sane, although his loyalty and devotion to duty border on fanaticism. He was a good friend of the mad Hitomi Vedau.