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 and Asian, is not a new term, but “it just hasn’t been this visible” until now, said Myra Washington, an associate professor at the University of Utah who studies mixed-race identities. “You’re just seeing now this generation that has come up wholly with a new way of being able to categorize themselves.” On TikTok and Instagram, there is a surging fixation on tracing mixed-race celebrities’ white-Asian heritage–– and famous Wasians are embracing the label.  In a social media post for Laufey’s new music video “ Madwoman ,” which starred Liu and Williams, along with other Wasians like actress Lola Tung and Katseye’s Megan Skiendiel, Liu…