Passage: First reports said that Kim Jong-un attended the private English-language International School in Gümligen in Switzerland under the name "Chol-pak" or "Pak-chol" from 1993 to 1998. He was described as shy, a good student who got along well with his classmates and was a basketball fan. He was chaperoned by an older student, who was thought to be his bodyguard. However, it was later suggested that the student at the Gümligen was not Kim Jong-un, but his elder brother Kim Jong-chul.Later, it was reported that Kim Jong-un attended the Liebefeld Steinhölzli state school in Köniz near Bern under the name "Pak-un" or "Un-pak" from 1998 until 2000 as the son of an employee of the North Korean embassy in Bern. Authorities confirmed that a North Korean student from North Korea attended the school from 1998 to 2000. Pak-un first attended a special class for foreign-language children and later attended the regular classes of the 6th, 7th, 8th, and part of the final 9th year, leaving the school abruptly in the autumn of 2000. He was described as a well-integrated and ambitious student who liked to play basketball. However, his grades and attendance rating are reported to have been poor. The ambassador of North Korea in Switzerland, Ri Chol, had a close relationship with him and acted as a mentor. One of Pak-un's classmates told reporters that he had told him that he was the son of the leader of North Korea. According to some reports, Kim was described by classmates as a shy child who was awkward with girls and indifferent to political issues, but who distinguished himself in sports and had a fascination with the American National Basketball Association and Michael Jordan. One friend claimed that he had been shown pictures of Pak-un with Kobe Bryant and Toni Kukoč.In April 2012, new documents came to light indicating that Kim Jong-un had lived in Switzerland since 1991 or 1992, earlier than previously thought.The Laboratory of Anatomic Anthropology at the University of Lyon, France, compared the picture of Pak-un taken at...

Question: How was Kim Jong-un described ?
shy