Belting out "I like आप oppa, what should I do" in her hit song, "Good Day," आई यू quickly rose to the चोटी, शीर्ष of the सूची as the nation's अगला younger sister and was adored द्वारा many uncle fans. However, as she gradually made her way into appearing on variety shows, we were shocked to see that आई यू was not so child-like as she seemed. For one, आई यू does not have a cute, high-pitched voice that we all thought she would have. Actually, it's quite deep. And her unexpected टिप्पणियाँ such as, "When girls are rushing to go out, they sometimes only wash their bangs," shows that she has a hidden tomboy, easy-going, and surprisingly mature personality behind her baby face.