The playful portmanteau invites jokes and makes talking about race fun, but experts warn it can come with some downsides. Olympic gold medalist Alysa Liu, “Heated Rivalry” actor Hudson Williams and singer Laufey became household names this year for different talents, but for many online fans, these stars are not just celebrities, but princes and princesses of the fictional royal court of Wasia and “ Wasian Avengers ” that are united by their mixed-race identity. Wasian, a portmanteau of white