Muichiro is a cold, yet calm person. He is quite forgetful and tends to forget certain things, but he is a powerful individual, at the age of only 14 years old, he was promoted to a Hashira in only two months of being in the Demon Slayer Corporation. He always has a blank expression on his face, and his words may be harsh at times, but he mostly speaks about truth. He has a traumatic past that he does not enjoy dwelling on.