Even if Todomatsu did offer, he hasn't killed anyone before. He always preferred someone else to do it when the house was planning to take out someone.

I think Asa-chan has killed enough people and it would make her sad.

Lavi would do it, but he would feel guilty about it afterwards. He was the one that brought me the house in the first place and may feel like he has to take care of me.

Satoru seems like he might be okay with it, but I do think it might make him sad. [ He's a big baby! ]