Peggy O'Neal is an American voice actress known for her extensive work in the English dubs of anime series and video games, with a career spanning from the early 1990s to the present. Her entry into voice acting was facilitated by actress and voice director Susan Blu, whom she met through acting classes. It was through this connection that she came into contact with Paul Di Franco, a casting agent for Saban Entertainment, leading to many of her early roles in anime localization.

O'Neal has voiced a wide array of characters across numerous popular series. In the role specified in the query, she is the voice of Tennyou Masaki in the Tenchi Muyo! Ryo Ohki OVA series, including the Final Confrontations arc. She also voiced Yakumo Tatsuro in Shinzo, a role she has cited as a significant breakthrough in her career. Another notable performance is her work as one of the voice actors for the Tachikoma tanks in the Ghost in the Shell: Stand Alone Complex series and its accompanying Tachikomatic Days shorts. Her filmography also includes the role of Leina in B-Legend! Battle Bedaman and Rieko in Kikaider-01: The Animation.

Beyond these specific credits, O'Neal is a familiar presence in English dubs from the early 2000s. She had recurring roles across several Digimon series, including Jun Motomiya in Digimon Adventure 02, Suzie Wong in Digimon Tamers, and Ranamon in Digimon Frontier. She also provided voices for characters in Eureka Seven, Wolf's Rain, and Lucky Star. Her work frequently saw her collaborate with a consistent group of voice actors in the industry. She has mentioned that her characters would often be the love interests for characters played by Steven Blum and Crispin Freeman, and she would sometimes play the sister to characters voiced by Dave Wittenberg.

In addition to her work in animation, O'Neal has contributed voices to several video games, such as Lindsay and Martha Uspenski in Catherine: Full Body and Roxanne Simpson in Ghost Rider. Outside of voice acting, she is also an educator, working as a part-time teacher for acting classes at Moorpark College.