The Divine Lord never regarded Ash and the others as worth noting.
Even if Ash had potential, as long as he hadn't set foot in Heaven, it was impossible for him to pose a threat to the Divine Lord. Demigods are fundamentally superior to mortals, just as Heaven looks down on Hell. In the same Wonder, the power wielded by demigods and the Divine Lord are worlds apart.
The first phase of the "Ash Extermination Battle" is to capture Ash, the second phase is the spoils battle that requires the Divine Lord to give it their all. To this end, four Divine Lords don't hesitate to entrust their natal Secret Realm to Angels descending to earth.
The so-called natal Secret Realm is the World Secret Domain used by the Divine Lord to enter Heaven. In truth, the natal Secret Realm is no different from other Secret Realms, but it must be the Secret Realm that the Divine Lord has controlled the longest, and if they have controlled it long enough, it may nurture a strand of subsidiary consciousness.
