Mui is stern and emotionless,strictly enforcing rules with severe punishments.His long black hair,suit with a brown belt and silver buckle,and brown boots are his trademarks. After his wife died following their son Muku's birth,Mui raised Muku alone. Ten years ago, while guarding the Box of Ultimate Bliss,Mui used Muku’s chakra to restore Kusagakure,but Muku was absorbed into the box. Now,Mui secretly seeks to reopen it and retrieve his son.Nobody knows about the box