LUCIFER
Nagawa Mira aside, Suigetsu has made it clear that he dislikes Sumire being with him. Even though the old man seems to be encouraging him to have a sexual relationship with Sumire. He wants to be in control of her. If she is by his side, Suigetsu cannot control her.
"Our situation as I have mentioned before is very complicated in this life. There were many factors that prevented us from being together. Because of those factors, I decided that telling you would have a negative reaction rather than a positive one. It was selfish of me to decide this on my own. However, I had to. I did not want to risk you disliking me. I wanted to give you a choice. " Lucifer paused. "When, we weren't together. You had other lovers, not just Toh."