Soyeon is a established South Korean voice actress known for her extensive work in anime dubbing for the Korean market. She became a member of the Korea Broadcasting Voice Acting Division in 1999, marking the start of her professional career. Over the years, she has lent her voice to a wide array of characters across numerous popular anime series and films, becoming a familiar presence to Korean audiences of animated content.

Her filmography includes a number of significant roles that highlight her range. In the romance drama Yosuga no Sora, she voiced the character Akira Amatsume. She also took on the role of Itsuki Akiba in both the I"s original video animation and its sequel, I"s Pure. In the long-running and popular series Hunter X Hunter, Soyeon provided the voice for Pakunoda, a member of the Phantom Troupe. Her credits also include the role of Vestaanu in the mecha anime Gaiking: Legend of Daikū-maryū. A more recent high-profile role came with the final installment of the Rebuild of Evangelion film series, Evangelion: 3.0+1.0: Thrice Upon A Time, where she voiced the character Misato Katsuragi.

Beyond the specific roles listed, Soyeon's career is marked by her work in several of the most globally recognized anime franchises. She is particularly known for voicing Nico Robin in One Piece and Rangiku Matsumoto in Bleach. Her other notable performances include Kagura and Rin in Inuyasha, Tomoyo in Tsubasa: RESERVoir CHRoNiCLE, and Lucia Nanami in Mermaid Melody: Pichi Pichi Pitch. This body of work demonstrates her significant contribution to bringing Japanese anime characters to life for Korean-speaking viewers.