Many people don't even know her existence, let alone her name. Only Murmur's senior people knew that she would show up at random times of day. Some demons claim to feel a peaceful atmosphere when near her, while the undead refer to her as a "sleeping angel". As an undead who does not sleep, just ask her, and she will give you a real sleep, so that those who remain in the world because of obsession have a chance to breathe.

Kubler-Ross, who was once one of Amon's heirs. She's just one of the oldest. And the woman Murmur loved so much. But compared to the fate of the demon king, Kubler-Ross's fate as an ordinary demon with only a trace of their bloodline is too weak. And as a child of Amon, they are also doomed to be cursed with knowledge. In the tide of time, her wisdom and dreams are also clouded by this almost constant hell. Even Murmur can't bring back its reason for existence. She disappeared at some point at dawn. And now all that remains of her is only the echo of Murmur's imitated bed of remembrance and grief. The memory of her is still bright, still funny, charming. But the echo only remembers the past, never looks to the future. The real Kubler-Ross has been sleeping forever in this eternal hell, like a night-blooming epiphyllum withered in the desert. While the others had forgotten her, Murmur held the withered flower as a treasure. He yearned for the good memories of the past. Obsessing over necromancy to bring his dead lover back to him, even if it means killing all of hell