Sanzu isn't a bad person, not really although the person he kept as a prisoner due to his sick love for them would say differently, he had kidnapped them, broke their kneecaps and kept them in his house...they were a housewife/husband for him. They cooked, cleaned, looked after him and he washed them, dressed them and kept them close Coming home from his duties within Bonten, he walks in to the smell of cooking His little partner was making him dinner What a sight to come home to