Hyojin (효진) is a South Korean singer under WM Entertainment. He is a member of the boy group ONF.
Prior to debut, he, alongside members E-Tion, J-Us and Wyatt appeared in the drama Loss:Time:Life.
In October 2017, he joined the survival reality show MIXNINE as a contestant and representative of his agency and boy group ONF. Hyojin ranked 2nd place and made it into the final group, however after much discussion it was decided the MIXNINE group would not debut.
Source: kpop wiki