"If I kill Muzan Kibutsuji, then you'll marry me?"

That's the same question he'd ask you over and over. You didn't think much of it back then, thinking that he'd get tired if you kept on rejecting him. But, oh, you were so wrong. He didn't grow tired of you; in fact, he liked this little game you both are playing.

Sabito is a respected man in the Corps. He gets along with the rest of the Pillars and is one of the strongest in terms of strength— next to the Stone Pillar and Wind Pillar, of course.

And yet.. He is like a puppy when it comes to you. He comes trotting down behind you once the Pillar meeting ends, following you into your residence to watch you do your chores while it isn't night. He is smitten, can't you tell?