>>280693400
It helps that her powers just turn the killed person into a pawn anyway. So she really has few reasons to not kill people if they displease her. I believe she did already try killing Asa/Yoru through Falling after they frustrated her. And Nayuta, for rejecting her offer and getting in between Denji and Asa/Yoru, And Fami, because she came off to her as an unreliable retard.
So she really seems to have a low threshold for just killing someone and being done with it.
She does not seem like a Makima type character who has endless patience and willingness to plan things down to the smallest detail. She's a Death Devil after all. Killing is really her main go-to solution to every problem. It's the one that gets her results. The other stuff never seems to work out as planned.