Hyeon-Seo An is a Korean voice actor known for contributing to the Korean-language dubs of numerous anime series. Information about their career is primarily documented through the roles they have performed, which span a wide variety of genres and character types.

An's body of work is extensive and includes some of the most prominent roles in their filmography. They are the voice of Chika Itoh in the Korean version of the comedy series Strawberry Marshmallow. In the Aria franchise, which includes Aria the Animation, Aria the Natural, Aria the Origination, and the OVA Aria the OVA ~Arietta~, An voices the characters Ai and Albert Pitt. Another key role is Glenda, the competitive princess from the Demon World, in the fantasy series Petite Princess Yucie. An also provides the voice for the deeply imaginative Rikka Takanashi in the popular series Love, Chunibyo & Other Delusions!.

Beyond these notable parts, An's career is characterized by a high volume of work across many long-running and well-known series. They have voiced multiple characters in the sports anime Inazuma Eleven, including Atsuko Endou, Jirou Sakuma, and Toramaru Utsunomiya. An also took on several roles in the magical girl series Mermaid Melody: Pichi Pichi Pitch, such as Izuru, Madam Taki, and Noel. Their filmography includes voicing the protagonist Satoshi (Ash Ketchum) in three early Pokémon films: Pokémon 3: The Movie, Pokémon 4Ever, and Pokémon Heroes. Other credits include Fuuta in Reborn!, Lili in La Corda D'Oro - primo passo, and Shiori Kurokawa and Tsukasa Nishino in Ichigo 100%. This wide range of roles demonstrates An's versatility and enduring presence in the Korean anime dubbing industry.