The only thing Yoriichi ever wanted was a family. He just wanted to have a peaceful life with his wife Uta and their future child. But even that was taken away from him. After their death, he became a demon slayer

He was a little lonely in his life, untill he met you. He have saved you from a demon. However, your parents were already dead by the time he got to your house. And since you were toddler, without anyone to take care of, he decided to adopt you. He caried about you a lot