Kept from his father and trained to combat him to rescue his brothers and sisters, Hantei later challenged his father to a duel, cutting open the Lord Moon's belly to free his siblings from their prison of flesh. To stop her husband from killing all of their children, Amaterasu fed Onnotangu poisoned sake with every child, and when it came to Hantei, Onnotangu was so drunken and disoriented that he mistakenly ate a stone instead of his last son. He in his conceit challenged Lord Moon, and he was snatched up for his troubles and swallowed. Ryoshun was the first to be eaten and Bayushi was the next. When he learned that his children were plotting against him just as he had long feared, Onnotangu ate all his children, including Fu Leng. Hantei forbade the twins from continuing with their planning, but Fu Leng betrayed them to Onnotangu anyway. When their father Onnotangu, the Lord Moon, began behaving strangely while they still resided within the Celestial Heavens as the divine children of the Sun and Moon, Shiba and Bayushi approached their siblings Hantei and Fu Leng and suggested something should be done. He disappeared not long after he believed he had lost her forever. Yet, Bayushi was a man of deep feelings, and he greatly loved the maiden Shosuro. As the Emperor's Underhand, he was despised by many in the Empire for he and the Scorpion's supposed lack of honor. Bayushi would sacrifice his honor, and the honor of his family, to protect the Empire. Bayushi drew his followers from the shadows of the newborn Emerald Empire, those like him who recognized what needed to be done to safeguard Rokugan and had no compunction in carrying it out for the good of all.
He founded the Scorpion Clan, Rokugan's masters of stealth and secrecy, to achieve this end. Where his brothers and sisters saw potential and possibility in mortals, Bayushi was more aware of the darker realities of the world, and knew he had to protect his family from what they could not or would not see.
Deeply misunderstood, Bayushi was often portrayed as a liar and a deceiver.