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Despite the innate concern she felt about fighting a being as deep and abyssal as Kireina, the Spider Empress had a strong sense of pride and would never bend the knee to her, she would never suddenly ask her to become her ally or something, like many of Kireina's enemies. And she would rather die again than become her friend. She felt like her purpose in life was to become someone better than Kireina, her parallel, and to surpass her even more. She now had the power, but that would be enough? A malicious thought passed through her mind as she thought about a similar tactic she had used before, and with these abilities that had awakened within her as a Primordial Beast which not even Hel knew about, perhaps such plans could be possible if she did things correctly.
Check "The Protagonist's Sister Is Actually the Strongest"!