POC makes no sense because it's a fictional world with fictional races, irl races don't apply.

But I do indeed notice how pale skin is so predominant, especially among scions, as my main character is dark-skinned so it stands out.
As others have said, blame the obsession for pale skin Japanese and neighouring countries have.

One thing that never added up though, Luoisoux was very dark skinned. His nephiews are very light skinned. Something doesn't add up.