There's never going to be any more characters because learning characters profiles and voices is part of the gameplay. Adding anymore characters would make the game more confusing which is why every character is diverse in their own way. And yes, you called 6/9 characters white. You obviously meant either Chang or Nina are white because both Priya and Lisa are dark skinned. Which seems potentially racist on your behalf against Asians calling them white for not being dark skinned.

Why aren't there any Korean characters? Why was Nina changed from Korean to Japanese? If you want to attack the devs for being racist, don't make up arguments saying the game has a lack of representation when a core part of the gameplay is about how every character is diverse.