Mu

Mu (뮤), born Suh Kyung-min, is the lead vocalist inside EPEX, the C9 Entertainment group that has spent the last few years turning the Youth series into a sustained identity rather than a one-off concept. Introduced in the pre-debut rollout and active since EPEX's June 8, 2021 debut, Mu sits near the melodic center of a team built around tension, release, and long-form narrative.

The strongest case for his page is the way EPEX's catalog has tightened around that narrative. From the early BIPOLAR launch period into Youth Chapter 1 : YOUTH DAYS, Youth Chapter 2 : YOUTH DEFICIENCY, Youth Chapter 3 : ROMANTIC YOUTH, and the 2026 follow-up Youth : Epilogue, Mu has been part of a lineup that kept returning to the same emotional universe while still moving the sound forward.

Because C9 has not foregrounded a separate personal public stack for him, the cleanest official touchpoints remain EPEX's verified group channels. That still tells the right story. Mu's visibility is tied to the group build, and the page should read as part of that larger arc, not as a disconnected idol stub.