Yes she's his child. But he doesn't remember her, nor does anyone else, because her mother died and she was the only one to witness her before her death. And since her tribe dies if they are forgotten or reproduce with non tribe members, she'll inevitably be forgotten. Looks like she was only able to stay alive because her mother implanted her own memories into her as an infant so she would remember herself. Thats just sad all around.
@yuchiyo Yea, I think it's because she's mixed blood. If she was a pure Aehri then she would likely have died long ago. We won't know for certain till later chapters, though. Good thing they did a batch release.
The description of the God that lives through memories really reminds me of “The Radiance” a god from Hollow Knight who also lives through the memories or dreams of her in others.
glad the emperor is not some assholes that suddenly become kind after getting (another) daughter
he just plainly forgot her because her race contitution