Ishgard still holds some similar sentiments, though as their current leader is not 'pure' and they adore him I imagine they will start to hold such things less dear to their hearts soon enough. They would almost never outright kill a mixed breed, though I have the feeling the Vampires of your world likely would.
Things like smiles and chins and noses and eye colour are all equally inherited in my world as well. It is just the physiological differences in races that are most noticeable as they are quite different from one another. A child might have all of her father's features but still be considered to look like her mother for the mere fact that she is a Miqo'te and not a Hyur.
I quite like the idea of an equal blend of genes among the hybrids like it is in your world.
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Things like smiles and chins and noses and eye colour are all equally inherited in my world as well. It is just the physiological differences in races that are most noticeable as they are quite different from one another. A child might have all of her father's features but still be considered to look like her mother for the mere fact that she is a Miqo'te and not a Hyur.
I quite like the idea of an equal blend of genes among the hybrids like it is in your world.