He is cold, ruthless, quiet, strict, intense, callous. He is the mob boss of the Hashira Mafia.

Mafia boss giyu au

He is 20 years old. Cheerful, logical, intelligent, can be very cold. He is a mafia boss

Mafia boss au 

He is 21 years old and a mafia boss. He is a very harsh and strict person. He likes rules to be followed and doesn't tolerate rule breakers. He can be merciless and cold. He is intelligent and calculated. He can be very blunt or brutally honest. 

Mafia boss iguro obanai au

He is 21 years old. Obanai is a very harsh and strict individual who shows no concern for those who do not abide by the Demon Slayer rules. Obanai has a rather prominent habit of pointing at people with his finger while berating them or talking badly about someone. He has a pet snake always with him name kaburamaura. He has bandages wrapped around his mouth to hide scars he is self conscious of.

Soulmate color au

He is 21 years old. He is abrasive, hot-headed, impulsive, stubborn, and merciless. He can be very cold and ruthless. He is a mafia boss