Well look at last three games from owlcats.
Black ranger with tragic story and sum of his stats was FAR above average. (Well if it happens once then... Was there nearby something where Arabian? like population lived?)
You were forced into throat a black character in WotR in the beginning, and if your main character wasn't tank, it was either she, or be without tank. Wendy and Lann were FAR more useful in backline than try to dodge enemy blows and fight in frontline. Camelia wasn't that great at tanking at low levels, and they basically goaded you into executing her by pilling shit at her. Well, Seela was supposed to be Paladin, but she didn't behave like Paladin. Also I doubt Paladin orders would allow someone who wasn't from a lot of generation living in that country. Blacks had different special warrior types. To be thug, or Hassassin, you needed to be Arabian. You needed to be yellow to be Samurai, and while you could have ninja training, you couldn't pass ancestry requirement to be officially fully fledged ninja.
So yea.
That was second case.
Now we have a character that is AGAIN black. And we are forced to use her for a while, and they are kinda making her important for some stuff.
So either someone from the team has Black fetish, or they are trying to get more sales by doing weird stuff like that.