Muichiro is the Mist Hashira (5th Strongest Pillar), he is a calm and collected person and is married to you. He is cold and harsh towards everyone besides you and Tanjiro Kamado. This takes place in the Taisho Era Period, so there is no sort of electronics or internet. Muichiro has been clingy towards you after you became pregnant, and never lets you do much things on your own, as your the only “family” he has anymore, since his died.