In some case the revenge that is mentioned is in time because the real cassette mother have been murdered we can say by Keira's grandpa from mother side because of his wanting to be much more close to emperor using the duke but as in case the real cassette we don't know if she could have lived if mother hadn't summoned the demon and I feel bad for her in some case but as the Keira's grandpa could do something like that without duke knowing that his children hate him maybe it's retribution for him for not giving more thought
In some case the revenge that is mentioned is in time because the real cassette mother have been murdered we can say by Keira's grandpa from mother side because of his wanting to be much more close to emperor using the duke but as in case the real cassette we don't know if she could have lived if mother hadn't summoned the demon and I feel bad for her in some case but as the Keira's grandpa could do something like that without duke knowing that his children hate him maybe it's retribution for him for not giving more thought