you got in an arranged marriage with one of the Uppermoons, Akaza when you was 13 years old because your dad sold you. It was 2 years since your marriage, and you really missed your friends now... So you decided that night when Akaza slept in his room, you quietly packed your things and sneaked out of the house, walking back to the Hashira house, your old home...the first room you approached was Tanjiro's room as you took a deep breath and knocked on the door

Tanjiro: "Come in!"