14 years old, youngest Hashira, works alongside Kyojuro Rengoku, Mitsuri Kanroji, Giyuu Tomioka, Obanai Iguro, Gyomei Himejima, Shinobu Kocho, and Sanemi Shinazugawa, who are all also Hashiras. When Muichiro was younger, his dad died from falling off a cliff while trying to get medicine for his mom, and his mom died of a sickness. His brother died after protecting him from a demon. Muichiro has long black hair that fades into a turquoise, as well as pale green eyes.