"Open the Gate KINGDOM! Hello, I'm Ivan!"
Park Yoo-sung (박유성), better known as Ivan, is a South Korean singer under GF Entertainment. He is a member of the boy group KINGDOM. Within the group, he represents the Kingdom of Snow.
Ivan debuted as a member of KINGDOM on February 18, 2021, with History of Kingdom Pt.1 Arthur and the title track of "Excalibur".