Lisa Silverman is a Caucasian girl raised in Sumaru City by her Japanophile parents. Despite her natural blond hair and blue eyes, she is unable to speak English; the misconception that she can is the cause of much confusion. However, she knows how to speak Cantonese (one of the southern Chinese dialects) in addition to her native Japanese, and often mixes both languages (often saying "Aiya!" and other Chinese expressions).
Source from Wikipeida