No, I don't think there's anything he can do - what I'm saying is that our friends out there may think there is.

After all, they don't know how the soulmate bond works, and Kimblee-san has done nothing but try to benefit himself for the entire duration of this exercise. You also share the same title of Incubus. From their perspective, isn't it logical to think that it's the same demon possessing both of you? Keeping one of you alive spares the demon; it doesn't matter if the other shell burns.

That's why I'm saying it looks suspicious.