Mukuro is one of Makai's Three Kings, though her path to power was anything but conventional. Enslaved from birth, she took a drastic step at age seven—pouring acid on her own body to make herself worthless to her master and finally escape. She replaced the burned right side of her body with mechanical parts and concealed her gender beneath a mask, essentially remaking herself from scratch.
Over centuries, she grew stronger by channeling the hatred rooted in her traumatic past, gradually building a kingdom until she had enough power to challenge the Makai Lord Raizen and wage war against him. But she was heading toward being consumed entirely by that rage until she found Hiei's lost Hirui stone, a jewel capable of calming her turbulent soul. That discovery led her to summon Hiei as an ally during the Three Kings conflict—a partnership that deepened into a genuine bond, since both understood what it meant to be shaped by childhood trauma and survival through hatred.
During the Makai tournament in the anime, Mukuro faced off against Hiei and claimed victory. But the real moment came after: Hiei broke the heavy chains she'd worn on her wrists since her enslavement, a symbolic gesture of freeing her from her past. The manga takes a different approach, with Hiei hunting down her former abuser and undoing the mental conditioning that had prevented her from ever fighting back against him.
Content compiled by AnimeList.moe from publicly available sources.
