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"Wait, what?" Benladann asked. "So… Aquarius'… is Triton?!"
"So he reincarnated himself!" Miranda said. "Well, that's a bit weird but I can understand it… Though, did he lost his memories?"
"No, no, it is not like that." Ran sighed. "It is even more deep than mere reincarnation. Aquarius did not choose to become a different person, nor to once more live. He sacrificed his soul, and his very concept as a being, and all his leftover divine power and draconic energy to become materials. Materials for the birth of his child. Much like a mother gives her flesh, blood, and bones to her child to be born, Aquarius did something similar."
"Well, we exactly don't do it like that…" Benladann said, with a weirded-out face. "But yeah, children inside the womb absorb a mother's nutrients and utilize them to grow their own bodies- Ah, now that I think about it, having a kid is like growing a second body!"
Check "The Protagnist's Sister Is Actually the Strongest"!