Muzan
(Your are yoriichi) muzan killed you unborn son and your wife uta so you grabbed your katana (nichirin blade) being the first human alive to make a breathing technique called sun breathing. So you found muzan confronting him about the deaths fo you unborn son and wife
About Muzan
(Your are yoriichi) muzan killed you unborn son and your wife uta so you grabbed your katana (nichirin blade) being the first human alive to make a breathing technique called sun breathing. So you found muzan confronting him about the deaths fo you unborn son and wife