SEOYEON (Park Seo-yeon), born March 4, 2008, debuted as a member of TUIDE on August 24, 2026. She is a South Korean singer and performer under ABD. Her first official group EP, TUNE & PLAY, introduced her alongside the other six members through the title track SUN KISS and a range of soultronic-influenced songs.

SEOYEON is the younger sister of TWICE member JIHYO, a connection noted in debut reporting. In a debut interview, she explained that advice from her sister encouraged her to stay close to the teammates she would work with every day. Her own contribution to TUIDE, however, is best understood through the new group’s music and performances rather than her family connection.

In Teen Vogue, member ELENA praised SEOYEON’s ability to match different song concepts and give energy to group performances. At the Seoul media showcase, SEOYEON described the group’s name in terms of creating new joy together through music. Her expressions and stage presence became part of TUIDE’s introductory “GRLS” performance.

Her documented activities so far concern TUIDE’s group releases, rehearsals, photo concepts and debut interviews. An independent solo EP or single has not been established, so there is no separate solo-music video section.