Ko Seong Ho, known professionally as Mujin, is a South Korean rapper and member of the group KINGDOM. He studied English in Los Angeles for 6 months and later in Vietnam for 4 months. He got accepted at JYP but he missed the deadline to reply as his phone was broken and could not read the message. He signed with GF Entertainment after he talked to Arthur, who convinced him to join after he left his previous company. In 2021, he debuted as part of Kingdom where each of the 7 members represents a different king in history. He helped compose part of the group’s first album.
(Source: Korean = Namu Wiki || Translation = MyDramaList)