Honkai Impact 3: Swallow Everything and Then Defeat Honkai Impact

I couldn't taste anything and couldn't remember what happened yesterday. An empty shell, a body with a "devouring" core transplanted into it. Until the collapse came, and a familiar Valkyrie saved me. Her blood splattered into my mouth. ——That was the first taste in life. Become the master of Hyperion, the warrior who controls the God's Key, and the demon whose hunger can never be satiated. If a person's entire personality, ideals, and memories come from plundering others and eating the lives they put together, should he have a true "self"? Multiple female protagonists, not a brainless novel