Shi Wan, birth name Im Woong Jae from Busan, is a vocalist of the group ZE:A. In 2004, he made his CF debut Like the First Time. He is the bestfriend of KwangHee. He's passionate about fashion. Before his debut, he managed an online clothing shop. He's the one who came up with Level Up's concept.

He is considered as the brain of the band because he is always teaching things to the other members and attended Engineering school in Busan. He also plays the violin. He plays the role of somebody perfect in looks, manners, and learning, an idol for all the scholars who becomes the crown prince's teacher in the Kdrama, The Moon that Embraces the Sun.

On July 11, 2017, he officially began his mandatory military service. Im was chosen to be an assistant instructor for new recruits due to his good performance. He was discharged on March 27, 2019.