Roshin (로신) is a South Korean singer under Starweave Entertainment. He is a member of the boy group JWiiver.
He is best known for participating in the reality show World Klass.
2019: World Klass
On July 24, 2019, Si Jun was introduced as the 15th trainee participating in the reality show World Klass. In the ninth episode, he was unfortunately eliminated.
2020–2022: JTG Boys and JWiiver
On February 8, 2022, he was re-introduced as a member of JWiiver under the stage name Roshin. They made their debut on February 17 with the mini album Jtrap.