Kristy Wu
Kristy Wu is an American actress, best known for her recurring role as ChaoAhn in the TV series, Buffy the Vampire Slayer and costarring as Melissa Wu in FlightDown. Other television credits include guest appearances on Joan of Arcadia, Freaks and Geeks, and Moesha. Her movie appearances include Whats Cooking, Drive Me Crazy, and Cry Wolf. She also costarred alongside Sara Paxton as one of the Sinister Sisters in the fourth installment in the Disney Channel film series Return to Halloweentown.
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Source: Wikipedia