The list is very long, and the children will be very diverse.
In general, I used the logic that for most cases either the race of the mother or Ryen as the father will be dominant. So a child of a human mother might be just a normal human, or could be a dragonic. There are only a few rare cases where characters got an unusual mix, like a combination of animal ears and dragon wings.
I made a few reference image for the childer a longer time ago. It's not necessarily up to date anymore in all cases, but gives a general idea for them. The order is based on the CG room pages.
[Warning: Contains spoilers of course, and the images are very big.]
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I can't say if all of them will eventually receive CG images. Currently, I make polls on SubscribeStar to decide which child will get done next. as a preview. The finished CGs will later be used to introduce the children when they're a bit older at some point of the time skip events.