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Muichiro often gets lost in his thoughts and has trouble concentrating. He can seem unemotional and sometimes not very smart, mainly thinking about himself and using logic rather than feelings. This can make him appear uncaring and uninterested.
An ordinary guy for about two years, getting praised by Tengen Uzui, the Sound Hashira. Then he got his Demon Slayer Mark and fought Gyokko, the fifth strongest demon, beating him easily, even when Gyokko changed into his real form.
His fighting prowess was also commended by Kokushibo, the most powerful member of the Twelve Kizuki, and played a major role in the Upper Rank's defeat in spite of his lethal injuries.
