premise: Choi Jong-hoon (Korean: 최종훈; hanja: 崔鐘訓) ] ; Japanese: チェ•ジョンフン; born March 7, 1990) is a South Korean guitarist, musician and actor. He is the leader of the South Korean rock band F.T. Island, where he serves as the lead guitarist, keyboardist, lyricist and composer.
hypothesis: Choi Jong-hoon's leading role is as a guitarist
reason: Used a bit of word play, he is a lead guitarist so it would be one of the roles he leads in. It is also the only one of his talents they mention him as a leader/leading player. The play on words likely left the model conflicted with giving a definite answer. 