Byuko was a young lord of small town near the Scorpion-Crab border. When the Plague War broke, Byuko feared for what could come from the rise of the dead, so he insisted Asahina Yasutora only treat adults, but the priest refused. Byuko ordered the children of the town relocated to nearby villages, forcing Yasutora and his priests to follow his orders. Yasutora went to speak with the young man, to offer him one final reprieve. Enraged, the brash young lord strike cut a superficial incision into Yasutora's lower torso. An Imperial Legion knew of his attack on an Asahina, killing Byuko and razing his village to the ground.