The niece of notorious Madripoorian criminal General Nguyen Coy, Vietnamese-born Xi'an "Shan" Coy Manh has been chiefly concerned with raising her two younger siblings Leon and Nga since coming to the United States. Coy Manh has demonstrated extreme determination when it comes to the well-being of her friends and family, which has brought her into conflict with local and national United States authorities on several occasions. During one superhuman conflict, Coy Manh went as far as to kill her own brother Tran in order to save the lives of her other siblings. Coy Manh's own body is helpless while she is using her mutant ability, posing a notable weakness. Having honed her abilities under Charles Xavier at various times, Coy Manh is currently a faculty member at the Xavier Institute.