In addition to being a vocalist, Sun-hee is also a songwriter, writing many of the songs on her later albums (including the celebrated hit 인연 "Fate").
Selain menjadi vokalis, Sun-hee juga seorang penulis lagu, menulis banyak lagu di album-album berikutnya (termasuk hit yang cukup terkenal 인연 "Takdir").