>>280044492
They'd probably hate each other precisely because they are like each other, as Devils tend to do. They're all playing the same game to become stronger than the other. Out of all the sisters, they are the most devil-like.
Although I think Death is also just coping about being more civilized, she is very "devilish" too with her over-indulgence, lack of care about killing masses of people, and the cannibalistic tendencies.