Zero.

Summary

Before the battle, Zero faced total destruction, with only a fragment of his primordial spirit escaping. His body was disassembled into subatomic particles, and although he could not reassemble them, a small portion of his core flame survived. This event, while disastrous, allowed Zero to witness the universe's fundamental parameters, broadening his understanding and ultimately enhancing his strength. He learned that he possessed a "key" to traversing worlds, which others sought. Meanwhile, his companions debated the possibility of reversing time to save him, contemplating a risky plan that involved sacrificing the three realms to obtain the key and advance through the multiverse.

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