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I-Pin is a 5-year-old assassin from Hong Kong. She is regularly transformed into her 15-year-old self by way of Lambo's Ten-Year Bazooka. The 15-year-old "Adult I-Pin" is now fluent in Japanese, and despite the fact that she is one of the most promising young assassins, she works part-time at a Chinese Restaurant ten years later in order to earn money for college tuition, though she still retains her skills.

Source from Wikipeida