Jongseob

Jongseob (종섭), born Kim Jong-seob (김종섭), has had more public pressure on him than most idols his age and that history shows up in the way he performs. As the maknae and lead rapper of P1Harmony, he is not simply the youngest member filling energy slots. He is one of the group's sharpest competitive products, someone whose pre-debut years were already shaped by national TV, elimination pressure, and the kind of early scrutiny that either hardens an artist or burns them out.

He first came to wider attention on K-Pop Star 6, where he won as one half of Boyfriend with Park Hyun-jin. That win led to a YG Entertainment trainee contract and later to YG Treasure Box, giving him a second high-profile development arc before he had even reached adulthood. FNC eventually became the label that turned that raw competition history into a durable debut. Revealed as the first member of P1Harmony in September 2020, Jongseob entered the group with a reputation for precision, focus, and a rap tone that already sounded broadcast-ready.

What has made him valuable since then is how naturally he grew with the group's sound. P1Harmony built its identity on aggressive rhythm, performance control, and clean hook execution, and Jongseob fits that architecture perfectly. From the Disharmony series through Harmony, the English-language EX, and the 2026 release Unique, he has remained one of the most technically dependable members in the lineup. He brings the kind of timing that makes a track feel tighter even when he is not carrying the biggest melodic moment.

Offstage, his background is just as specific. He grew up in a family rooted in dance, with a father from the Korea National Contemporary Dance Company and a mother who worked as a jazz dancer. That explains a lot about why his performance instincts read so complete. Jongseob was never only learning rap. He was raised around movement, discipline, and stage grammar, which is exactly why he already feels like a long-game artist rather than a former child contestant still figuring himself out.